When sourcing industrial chemicals, a safety data sheet (SDS) is more than a regulatory requirement—it is a tool for supplier evaluation, risk management, and quality assurance. An SDS sodium dodecyl sulphate document, for instance, reveals critical handling protocols, toxicological profiles, and composition data that can guide procurement decisions far beyond that single surfactant. For buyers of sodium sulphate anhydrous, the same principles apply: the quality of a supplier’s SDS reflects their commitment to safety, transparency, and product consistency. In this article, we examine how a deep reading of an SDS—using sodium dodecyl sulphate as a benchmark—can elevate your approach to procuring high-purity sodium sulphate for detergent, glass, textile, and pulp applications.
Every industrial buyer has faced a supplier that delays or provides incomplete documentation. An SDS is not a mere formality; it is a legally mandated document under GHS (Globally Harmonized System) that communicates hazards, safe storage conditions, first-aid measures, and physical-chemical properties. When you receive an SDS sodium dodecyl sulphate from a potential vendor, you can immediately assess their level of professionalism. A well-structured SDS, containing detailed sections on composition, toxicological information, and ecological impact, indicates a supplier that invests in regulatory compliance and product stewardship. For sodium sulphate anhydrous buyers, the same scrutiny applies: request the SDS early and compare it against industry standards to ensure the supplier’s material meets your facility’s handling capabilities and safety protocols.
Anaalyzing an SDS sodium dodecyl sulphate teaches valuable lessons applicable to any inorganic salt, including sodium sulphate. Section 2 (Hazard Identification) of a sodium dodecyl sulphate SDS typically lists skin and eye irritation warnings, signaling the need for personal protective equipment (PPE) during handling. While sodium sulphate anhydrous is less irritating, it can still cause mild respiratory or dermal discomfort if dust is inhaled or if prolonged contact occurs. A responsible supplier’s SDS will explicitly state these risks, recommend local exhaust ventilation, and specify the appropriate glove material—typically nitrile or neoprene. Additionally, Section 9 (Physical and Chemical Properties) of the sodium dodecyl sulphate SDS shows data points like pH, melting point, and solubility. For sodium sulphate, expect a pH of 5–8 in a 5% aqueous solution, a melting point around 884°C, and a solubility of approximately 280 g/L at 20°C. Cross-checking these values with your supplier’s certificate of analysis (CoA) verifies batch-to-batch consistency and helps you avoid off-spec material that can disrupt production.
Sodium hydrogen sulfate (NaHSO₄) is chemically distinct from sodium sulphate (Na₂SO₄) but occasionally confused by new buyers. Understanding sodium hydrogen sulfate uses clarifies why the two products serve different industrial roles. Sodium hydrogen sulfate, often sold as a monohydrate, is strongly acidic and used as a pH reducer in swimming pools, a flux for metal cleaning, and a component in acidic cleaners. In contrast, sodium sulphate anhydrous is neutral and widely employed as a filler in detergent powders, a fining agent in glass manufacturing, and a cooking liquor component in kraft paper pulping. Mistaking one for the other can cause severe process upsets: adding sodium hydrogen sulfate to a detergent formulation expecting sodium sulphate would introduce unwanted acidity, compromising product stability. A reliable SDS for each substance immediately flags this distinction through hazard classification and pH data, preventing costly procurement errors.
The question “is sodium sulfate good for skin” often arises because the compound appears in personal care rinse-off products, but the anhydrous industrial grade is a different matter. Pharmaceutical- or cosmetic-grade sodium sulphate is neutral and non-irritating at low concentrations, yet industrial-grade material contains trace impurities and is handled in bulk quantities that can generate airborne dust. Inhalation of fine sodium sulphate dust may cause mucous membrane irritation, and prolonged skin contact with concentrated solutions can lead to dryness. An SDS for sodium sulphate anhydrous will categorize it as “not hazardous” under normal conditions of use but still recommend standard hygiene measures: wash hands after handling, wear dust masks during bulk transfer, and use goggles in dusty environments. Buyers should never rely solely on the substance’s intrinsic safety; they must demand comprehensive SDS documentation that outlines occupational exposure limits (OSHA PEL for inert or nuisance dust is 15 mg/m³ total, 5 mg/m³ respirable) and first-aid procedures. A supplier that cannot furnish a complete, GHS-compliant SDS for sodium sulphate anhydrous should be approached with caution.
While the safe handling of chemicals is paramount, buyers also need a thorough understanding of sodium sulphate anhydrous uses to align procurement specifications with end applications. The detergent industry accounts for a major share of global sodium sulphate consumption; the compound acts as an inert filler and processing aid that improves powder flow and prevents caking. Detergent manufacturers typically require an anhydrous assay of 99% min, with controlled iron content (<20 ppm) to maintain whiteness. In glass production, sodium sulphate acts as a fining agent, helping to remove bubbles from molten glass and improving clarity. Here, a purity of 99% is standard, but some glass factories also demand low calcium and magnesium to avoid refractory corrosion. Textile dyeing employs sodium sulphate as a levelling agent to promote uniform dye uptake on cotton and rayon; this application tolerates slightly higher chloride levels but insists on consistent mesh size to prevent spot dyeing. Kraft paper pulping adds sodium sulphate to the cooking liquor, where it is chemically reduced to sodium sulfide—a critical active component in the kraft process. Chemical feedstock use covers the manufacture of sodium silicate, sodium sulfide, and other derivatives. Each of these sodium sulphate anhydrous uses carries distinct quality demands, making it essential to work with a supplier like Hailei that offers customized specifications and batch traceability.
To resolve the fundamental query, what is sodium sulphate anhydrous, it is the dehydrated form of sodium sulfate (Na₂SO₄) containing no water of crystallization. Unlike Glauber’s salt (decahydrate), anhydrous sodium sulphate is a free-flowing white crystalline powder with high chemical stability and a melting point of 884°C. Industrial grades typically achieve a minimum purity of 99.0%, with key controlled impurities including chloride (≤0.15%), moisture (≤0.2%), water-insoluble matter (≤0.05%), and pH (6–8). Bulk density usually ranges from 1.2–1.4 g/cm³, and products can be supplied in various particle sizes (50–200 mesh) depending on application needs. Meeting these specifications consistently requires advanced manufacturing processes, rigorous in-process testing, and ISO-certified quality management. Buyers should request a typical CoA alongside the SDS to cross-verify these parameters and ensure the material will perform reliably in their specific process.
Smart industrial buyers treat the SDS as a component of a broader supplier qualification checklist. When evaluating an SDS sodium dodecyl sulphate or any chemical, look for clues about the manufacturer’s quality culture: Is the SDS dated and version-controlled? Does it reference REACH, TSCA, or other relevant regulations? Are the contact details and emergency telephone number valid and responsive? A well-maintained SDS suggests the supplier is organized and compliant. Carry this same scrutiny into sodium sulphate procurement. Request the SDS for sodium sulphate anhydrous early in the negotiation, and compare its hazard classifications and physical data against independent sources and competitor documents. Many quality-conscious suppliers, including Hailei, also provide third-party test reports, ISO 9001 certificates, and REACH registration confirmation. Combining document review with a factory audit or a sample batch validation significantly reduces the risk of receiving substandard or mislabeled material. Additionally, incorporate SDS-derived safety information into your facility’s risk assessment and operator training programs to ensure safe unloading, storage, and batching.
Whether you are benchmarking supplier documentation through an SDS sodium dodecyl sulphate or directly purchasing high-grade sodium sulphate anhydrous, the rigor you apply to safety data evaluation will pay off in smoother operations and consistent product quality. Hailei Fine Chemical offers a 99% purity sodium sulphate anhydrous that meets the strict demands of detergent, glass, textile, and pulp industries, backed by comprehensive, GHS-compliant SDS and technical support. Our team is ready to assist with your custom specifications and bulk logistics. Request a quote today and receive the documentation and samples you need to make an informed purchasing decision.
Understanding the physical properties of sodium sulfate is essential for procurement managers, chemical engineers, and production supervisors who rely on this versatile inorganic salt. Whether you manufacture detergent powders, produce flat glass, dye textiles, or pulp kraft paper, the performance and cost-effectiveness of sodium sulfate depend directly on its physical characteristics — from particle size and bulk density to solubility and hygroscopicity. At Weifang Hailei Fine Chemical Co., Ltd., we supply high-purity sodium sulphate anhydrous (Na₂SO₄, 99% min) engineered to meet the exacting physical specifications of global industrial supply chains. In this guide, we dissect each critical physical property, explain its practical implications, and help you make informed bulk purchasing decisions.
When scouting for reliable sodium sulphate anhydrous, many buyers ask: why sodium sulphate over alternative fillers, fluxes, or process chemicals? The answer lies in a unique combination of physical properties that no other commodity chemical can replicate at the same price-performance point. Sodium sulfate offers a high melting point (884 °C) that makes it an excellent flux in glassmaking; a stable, non-hygroscopic crystalline structure (in anhydrous form) that prevents caking in detergent powders; and a neutral pH in solution that safeguards sensitive dye baths. Its ability to absorb water molecules from organic solutions — often summarized as how does sodium sulfate dry a solution — comes from its transition to the decahydrate (Glauber’s salt) below 32.4 °C, a property exploited in laboratory and industrial drying applications.
For Indian subcontinent buyers, you may encounter the term what is sodium sulphate in Hindi — सोडियम सल्फेट — commonly used in textile and soap industries across Gujarat and Maharashtra. Regardless of language, the physical benchmarks remain the same. Let’s break them down systematically.
Two of the most scrutinized physical properties of sodium sulfate for dry blend operations are particle shape and bulk density. Anhydrous sodium sulfate typically crystallizes in an orthorhombic or thenardite structure, producing irregular, somewhat angular particles. These particles can be milled or granulated to achieve specific size distributions, directly influencing flow behaviour, dusting tendency, and mixing homogeneity.
For detergent powder filler applications, flowability and segregation resistance are paramount. A typical PSD specification might be 95% passing 30 mesh (0.595 mm) and 60% retained on 100 mesh (0.149 mm). This coarse-fine blend ensures that sodium sulfate particles efficiently occupy void spaces between surfactant granules, improving bulk density and preventing stratification during pneumatic conveying. Buyers can request custom-sieved sodium sulphate from Hailei Chemical to match the existing granular matrix of spray-dried or agglomerated powders. Too many fines (< 100 mesh) increase dust formation and can cause nozzle blockages, while overly coarse particles feel gritty and can abrade packaging lines. The right PSD, therefore, minimizes sodium sulfate bulk price volatility by reducing handling losses and rejection rates.
Loose bulk density for anhydrous sodium sulfate typically ranges from 1.35 to 1.55 g/cm³, with a tapped density 10–15% higher. This high density compared to organic fillers results in more compact storage volumes and lower freight costs per functional unit. Procurement teams analyzing sodium sulfate bulk price often overlook the landed-cost advantage conferred by density — a 20-foot container can hold approximately 25–27 metric tonnes of dense sodium sulfate, versus only 16–18 tonnes for many lightweight alternatives. For kraft paper pulping, this density also improves dissolution kinetics in the recovery boiler smelt dissolving tanks, where dense prills sink and dissolve without floating on the green liquor surface.
Glass manufacturing is the single largest consumer of sodium sulfate, where it acts as a fining agent and flux. The physical properties of sodium sulfate critical here are its melting point (884 °C) and heat of fusion (approx. 24.4 kJ/mol). At glass melting temperatures (1450–1550 °C), sodium sulfate melts and decomposes to release SO₃ gas, which helps to sweep out small bubbles (fining). The relatively low melting point compared to silica facilitates earlier liquid phase formation, reducing furnace energy consumption.
Anhydrous sodium sulfate has a coefficient of linear thermal expansion of about 4.5 × 10⁻⁵ /°C. In a glass batch, this mismatch with other raw materials can influence the agglomeration behaviour of the pre-reacted feed. Glass producers routinely specify a narrow particle size range (−200 mesh) to ensure rapid dissolution and uniform thermal reaction. Hailei Chemical supplies a glass-grade sodium sulphate with controlled iron content (< 50 ppm Fe) and consistent particle fineness, ensuring predictable melting behaviour and avoiding colour contamination. Linking to our product page, you can review the detailed specifications for glass-grade sodium sulphate.
The solubility curve of sodium sulfate is unusual and has profound industrial consequences. In water, solubility increases sharply from 4.8 g/100 mL at 0 °C to 42.7 g/100 mL at 100 °C, but above 32.4 °C the stable solid phase is anhydrous sodium sulfate. Below this transition temperature, the decahydrate (Glauber’s salt, Na₂SO₄·10H₂O) precipitates. This temperature-dependent behaviour is the key to understanding how does sodium sulfate dry a solution.
When anhydrous sodium sulfate is added to a moist organic solution (e.g., extraction solvents in pharmaceutical synthesis or fine chemical production), it rapidly absorbs free water to form the decahydrate. Each mole of Na₂SO₄ can bind ten moles of water, removing it from the organic phase. The hydrated crystals then settle or can be filtered out, leaving a dry solution behind. The process is purely physical, driven by the thermodynamic preference of the sodium sulfate to exist as the decahydrate at room temperature. Buyers frequently ask “how does sodium sulfate dry a solution” to evaluate its use as a laboratory or pilot-scale desiccant. In bulk chemical processing, the same principle allows large-scale drying of solvents or liquid intermediates without thermal distillation, reducing energy costs. The key physical requirements are high absorption capacity (purity >99% ensures maximum water uptake) and appropriate particle size for rapid hydration without clumping. This property is a major reason why sodium sulphate remains a go-to desiccant in the chemical and pharmaceutical industries.
In textile dyeing, sodium sulfate is used as a levelling agent, particularly in direct and reactive dyeing of cotton. The physical property that matters most is dissolution rate. A medium-granular form (typically 200–500 µm) dissolves quickly in the hot dye bath without leaving undissolved specks that could cause unlevel dyeing. Purities of 99% or higher prevent interference from chloride or calcium ions that could complex with dyes. The neutral pH (7–8 for a 5% solution) also protects pH-sensitive dyestuffs. Our clients in the textile sector routinely test for dissolved clarity: a 10% solution at 40°C should be clear with a turbidity reading below 10 NTU, reflecting minimal insoluble residues. Hailei Chemical’s quality control ensures that every batch meets these solubility benchmarks, supporting consistent dye uptake and shade reproducibility.
Despite being a desiccant, anhydrous sodium sulfate is itself quite stable under normal warehouse conditions, with a critical relative humidity of about 82% at 25 °C. This means it does not readily absorb atmospheric moisture unless the ambient humidity exceeds that threshold. This property is a double-edged sword: it allows long-term storage in standard super sacks without caking, but in tropical climates, special packaging (laminated polypropylene bags with PE liners) is advisable. Understanding the physical properties of sodium sulfate related to hygroscopicity helps buyers in high-humidity regions like Southeast Asia or coastal India design appropriate storage facilities and avoid lump formation that could disrupt pneumatic conveying systems.
A 5% aqueous solution of high-purity sodium sulfate exhibits a pH of 7.0–8.0. This near-neutral character makes it safe to use in chemical feedstock applications for producing sodium sulfide, sodium silicate, and other derivatives, where acidic or alkaline side reactions must be avoided. Its chemical stability at high temperatures and in the presence of reducing agents also makes it a reliable feedstock in the kraft paper pulping industry for makeup chemical in the recovery cycle.
When comparing sodium sulfate bulk price from different suppliers, the quoted FOB or CIF price per metric tonne is only a starting point. The physical properties of the material directly influence the total cost of usage:
Requesting a detailed technical datasheet along with your quotation allows you to evaluate the actual value represented by the physical properties. As a leading Chinese exporter, Weifang Hailei Fine Chemical Co., Ltd. provides full transparency on these metrics. For a current price offer tailored to your volume and destination, get a quote here.
Reputable suppliers verify the physical properties of sodium sulfate using standardized ASTM or ISO methods. Typical testing includes:
Hailei Chemical operates an ISO 9001-certified laboratory with in-house testing capabilities for every batch. Certificates of Analysis (COA) accompany every shipment, giving buyers full confidence in the supplied physical parameters.
We recommend that industrial buyers use the following checklist to align physical property requirements with their process needs:
By matching these physical property criteria with your operational requirements, you reduce total cost of ownership and enhance product quality. When you’re ready to source, explore our sodium sulphate product range for technical datasheets and sample requests.
The physical properties of sodium sulfate are not mere academic data points — they are the real-world determinants of process efficiency, product quality, and cost control in detergent, glass, textile, and pulping industries. By focusing on particle size distribution, bulk density, melting point, solubility, hygroscopicity, and chemical stability, you can answer the question “why sodium sulphate” with conviction and select a grade that optimizes your production line. Weifang Hailei Fine Chemical Co., Ltd. stands ready to support your procurement with consistent, high-purity sodium sulphate anhydrous that meets rigorous physical property specifications. For a customized quote and COA, please contact our sales team today.
When procurement managers and formulation chemists search for cost-effective mineral fillers, sodium sulphate anhydrous uses consistently rank among the most critical considerations for household and industrial detergent production. With over 60% of global sodium sulphate consumption tied to powdered laundry detergents, understanding exactly how Na₂SO₄ functions—and what to look for when sourcing it—can mean the difference between a high-performance product and a logistical liability. At Hailei Chemical, we supply high-purity sodium sulphate anhydrous (99% min) specifically refined for the exacting demands of modern detergent operations. This guide examines the unique role sodium sulphate plays in detergent powders, the chemical and physical specifications that matter most to industrial buyers, sourcing origins, and the supplier evaluation framework that ensures steady, compliant supply.
What is sodium sulphate anhydrous exactly? In simple chemical terms, it is the dehydrated form of sodium sulphate (Na₂SO₄) with no water of crystallization. Unlike its decahydrate cousin (Glauber’s salt), the anhydrous variety contains essentially zero free moisture and offers superior flowability, a neutral pH in solution, and a consistent particle size distribution—all crucial traits for dry-blended detergent powders. The question why sodium sulphate dominates the filler market can be answered by its inert chemical nature: it does not react with surfactants, builders, or enzymes, nor does it alter the visual or olfactory characteristics of the final product. Instead, it functions as a functional diluent that:
For detergent manufacturers, the selection of filler directly impacts production efficiency, shelf stability, and overall sensory experience. Sodium sulphate anhydrous meets all these criteria, which is why it remains irreplaceable even as formulation trends evolve.
Formulators cannot simply substitute any inert powder: the physical properties of sodium sulfate must align precisely with the manufacturing process. In dry mixing and spray-drying post-blending, the following characteristics are deal-breakers:
Industrial-grade sodium sulphate anhydrous typically exhibits a crystalline or granular morphology with a mean particle diameter between 100–300 µm, though finer grades (20–100 µm) are available for special dispersion needs. Uniform, non-friable crystals prevent segregation in storage silos and ensure homogeneous blending with spray-dried base beads. Particle shape also influences bulk density—a parameter tightly controlled at 1.2–1.4 g/cm³ for heavy-duty detergents.
The free-flowing nature of anhydrous sodium sulphate translates to a packed bulk density that stabilizes the final product’s scoop weight and volumetric dosing. A consistent density of 1.35 g/cm³ (loose) is standard in the sodium sulphate grades supplied by Hailei Chemical.
Because it is anhydrous, the material can slowly absorb moisture from the air if stored improperly. However, premium grades are coated or processed to retain ≤0.1% moisture, which prevents premature caking. The low hygroscopicity relative to sodium chloride or urea makes it the preferred filler in humid climate packaging.
With a water solubility of approx. 28 g/100 mL at 25°C, sodium sulphate dissolves fast enough during the wash cycle to avoid residue on fabrics, yet not so fast that it creates dusting issues during manufacturing. Its dissolution is also endothermic, contributing slightly to the cooling sensation of the powder—a minor but appealing consumer touch.
A 5% aqueous solution shows a pH of 5.5–7.5, essentially neutral, so it doesn’t interfere with alkaline builders like sodium carbonate or acidic boosters. This inertness underpins the answer to why sodium sulphate is chosen over alternative fillers that might degrade enzymes or optical brighteners.
While detergents are the dominant application, the scope of sodium sulphate anhydrous uses in this single industry is remarkably diverse. Procurement teams should understand the variety of roles to engage suppliers with accurate requirement profiles.
In high-volume laundry powders, sodium sulphate constitutes 20%–40% of the final product weight. It is added post-tower to adjust active matter content, reduce stickiness of surfactant-rich beads, and standardize the apparent density. The anhydrous filler does not absorb surfactants, so the cleaning efficacy per wash remains predictable.
Compact detergent tablets and water-soluble pods demand exceptional carrier materials that dissolve cleanly. Anhydrous sodium sulphate acts as a disintegration aid that supports tablet hardness while promoting rapid dissolution. Its compatibility with enzymes and bleaching agents (percarbonate/perborate) makes it a technical enabler in multi-layer tablet engineering.
For manufacturers blending dry ingredients directly without spray towers, sodium sulphate serves as a flow conditioner that prevents bridging in hoppers and augers. It also reduces dust generation during high-speed filling lines—an important occupational health consideration.
Contract manufacturers and private-label producers rely on the filler’s low cost and inertness to replicate national brand benchmark densities while hitting price targets. By adjusting the sodium sulphate ratio, a plant can offer tiered product lines—economy, mid-range, and premium—all using the same active surfactant package.
Beyond detergents, other well-known sodium sulphate anhydrous uses span glass manufacturing (cullet flux and fining), textile dyeing (levelling agent for reactive and direct dyes), and kraft paper pulping (digestion additive), all of which our product page details. However, the detergent sector remains the largest and most quality-sensitive buyer community.
Knowing where does sodium sulfate come from is essential for supply chain risk management and sustainability reporting. Industrial sodium sulphate is obtained through two primary routes: natural extraction and synthetic production. For detergent-grade material, both paths are viable, but each has distinct trace element profiles that can affect final product quality.
Extensive deposits of mirabilite (Na₂SO₄·10H₂O) and thenardite (anhydrous natural Na₂SO₄) exist in China, Canada, the United States, Spain, and Mexico. These ores are mined or solution-mined, then purified via recrystallization or evaporation. Natural-source sodium sulphate often contains trace levels of calcium and magnesium (typically <100 ppm each), which detergent producers must monitor because hard water ions can deactivate certain surfactants. High-quality natural purification processes, such as those employed by Hailei Chemical’s upstream partners, deliver 99%+ purity suitable for the most demanding formulations.
Globally, approximately 40% of sodium sulphate is recovered as a by-product from chemical processes, particularly:
Synthetic material can carry organic impurities or chlorine residues if refining is incomplete. For this reason, detergent buyers frequently specify “naturally derived” or require a detailed certificate of analysis (CoA) showing negligible total organic carbon (TOC). Our team can supply both natural and carefully controlled synthetic grades, always accompanied by batch-level transparency.
China is the world’s largest producer and exporter of sodium sulphate, leveraging abundant mirabilite deposits in Sichuan, Qinghai, and Jiangsu provinces. Purchasing directly from a Chinese manufacturer like Weifang Hailei Fine Chemical Co., Ltd. eliminates layers of intermediaries, ensures recent production dates, and provides access to flexible packaging options (25 kg bags, 1,000 kg supersacks, or bulk). For procurement managers, verifying that the source’s logistics chain supports on-time delivery with full customs documentation is as important as the chemical itself—a strength we’ve built over years of B2B export experience.
A common value-engineering exercise asks: why sodium sulphate when sodium carbonate, zeolites, or even chloride salts could serve as fillers? The answer lies in a balance of cost, performance, and process compatibility.
Sodium sulphate anhydrous, by contrast, offers a “neutral” footprint: no unexpected pH shifts, no insoluble residues, and a density that mimics premium powder benchmarks. Its price point—generally $100–$180 per metric ton FOB China depending on grade—makes it the most economical true filler. When detergent brands need to launch a promotional “more washes per pack” variant, increasing the sodium sulphate portion is the default strategy without reformulating active components. This flexibility, combined with its non-hazardous classification for transport (non-IMO regulated), cements why sodium sulphate remains the workhorse filler of the surfactant world.
Translating the chemical’s role into a purchase specification is the procurement team’s core responsibility. A rigorous spec sheet for sodium sulphate anhydrous destined for detergent blending should include:
At Hailei Chemical, these specifications are not aspirational—they are contractual. Our sodium sulphate product page lists the typical CoA ranges, and we encourage buyers to request a pre-shipment sample for in-house evaluation.
Securing a long-term supply agreement requires more than a competitive FOB price. Develop a weighted scorecard covering these dimensions:
Even the best raw material can underperform if handling practices are not optimized. Recommendations for using sodium sulphate anhydrous in a powder detergent facility:
As the detergent market moves toward single-dose pods, ultra-concentrated liquids, and eco-friendly sheets, some may question the future of a traditional powder filler. However, granular and powdered detergents still account for over 50% of the global laundry category in volume terms, particularly in developing economies and institutional/industrial sectors. Moreover, innovative dry laundry strips and powder-to-liquid tablets incorporate micronized sodium sulphate as a structure-building and dissolution-control agent. The unique physical properties of sodium sulfate—hardness, solubility kinetics, and thermal stability—make it adaptable to next-generation formats. This ensures that sodium sulphate anhydrous uses will continue to expand, not contract, in the coming decade.
Weifang Hailei Fine Chemical Co., Ltd. is more than a trading entity—we are a fully integrated exporter with deep technical knowledge of fine chemicals. For sodium sulphate specifically, our value proposition rests on three pillars:
If you are evaluating new sources or renewing your annual sodium sulphate contract, we invite you to speak with our technical sales team. From understanding where does sodium sulfate come from to finalizing FOB or CIF terms, we provide end-to-end support.
Contact us today to receive a competitive quotation and request a complimentary sample for performance validation. Visit our Get a Quote page or email us directly—let’s ensure your detergent line never skips a beat.
In the competitive world of powder detergent formulation, every ingredient must deliver measurable value. Among the unsung heroes of high-performance detergents, sodium sulfate benefits stand out as a critical factor for manufacturers aiming to balance cost, quality, and production efficiency. As a leading global supplier, Weifang Hailei Fine Chemical Co., Ltd. provides premium anhydrous sodium sulphate (Na2SO4) that meets the exacting demands of modern detergent plants, glass factories, and textile mills. This article explores how understanding the full scope of sodium sulfate benefits—from its chemical fundamentals to supply chain integration—can transform your manufacturing operations and bottom line.
To fully grasp sodium sulfate benefits, it’s essential to start with the compound’s identity. Sodium sulfate, with the chemical formula Na2SO4, exists in both anhydrous and hydrated (Glauber’s salt, Na2SO4·10H2O) forms. For industrial applications, particularly in detergent manufacturing, the anhydrous grade is preferred due to its high purity and low moisture content. At Hailei Chemical, our sodium sulphate anhydrous offers a minimum purity of 99%, making it an ideal filler and processing aid.
The physical properties of sodium sulfate directly contribute to its industrial utility. It is a white, crystalline solid with a melting point of 884°C, excellent thermal stability, and a neutral pH in aqueous solution. Its solubility in water is moderate (approximately 28 g/100 mL at 25°C), which ensures it does not prematurely dissolve during storage but readily disperses during the wash cycle. These characteristics underpin why what is sodium sulphate used for spans numerous sectors—yet its most impactful application is in detergent powders.
Not all sodium sulfate is created equal. The sodium sulfate benefits you realize in production strongly correlate with two key parameters: purity and particle size distribution. A 99% pure anhydrous product minimizes inert contaminants that could interfere with surfactant performance or cause undesired residues on fabrics. Meanwhile, a controlled particle size (typically 100–200 mesh) ensures optimal bulk density and flowability during spray drying or dry blending processes. Our product at high-purity sodium sulphate anhydrous is meticulously screened to meet these specifications, allowing detergent formulators to achieve consistent batch quality.
Detergent manufacturers worldwide rely on sodium sulfate as a functional filler, but the value extends far beyond simple bulking. Here are the critical sodium sulfate benefits that can give your products a competitive edge.
Powder detergents must flow freely through packaging lines and remain non-caking during storage, especially in humid climates. Anhydrous sodium sulfate possesses a natural resistance to moisture absorption (<2% hygroscopicity at 50% relative humidity), making it an excellent anti-caking agent. When incorporated at 20–40% by weight, it coats other hygroscopic components, preventing lump formation and ensuring consistent dispensing for end-users.
In the $200+ billion global detergent market, raw material costs are under constant pressure. Sodium sulfate serves as an economical filler that maintains—and often improves—powder integrity. Unlike inert fillers that dilute cleaning power, sodium sulfate actively contributes to the ionic strength of the wash solution, enhancing the detergency of surfactants. This synergistic effect means manufacturers can achieve target density and volume at a fraction of the cost of alternative bulking agents, directly improving gross margins.
During spray drying, sodium sulfate’s crystalline structure provides an ideal substrate for adsorbing liquid surfactants, enzymes, and optical brighteners. This carrier function ensures uniform distribution of active ingredients throughout the powder granule. The result is a detergent that delivers consistent performance across every wash load—a quality attribute that builds brand loyalty in consumer markets.
Detergent slurry preparation and spray drying involve temperatures exceeding 200°C. Sodium sulfate’s high melting point and thermal stability prevent decomposition or off-gassing during these stages, safeguarding worker safety and product integrity. This reliability simplifies process control and reduces downtime, key advantages for large-scale producers.
While the focus here is on detergents, the versatility of sodium sulphate reinforces its status as a strategic chemical feedstock. Understanding what is sodium sulphate used for across industries also highlights why securing a consistent, high-quality supply is vital.
For buyers whose primary need remains detergent filler, this broad applicability means sodium sulfate is a high-volume commodity with mature global logistics, supporting stable supply chains even during market disruptions.
When evaluating sodium sulfate for sale, beyond price per metric ton, several quality and logistics factors separate a transactional supplier from a true strategic partner.
By partnering with a dedicated exporter like Hailei Chemical, you gain more than a transaction; you secure a continuous improvement loop that amplifies the sodium sulfate benefits in your production line.
For buyers in South Asia, the sodium sulphate price in Pakistan often serves as a benchmark for regional procurement. Prices fluctuate based on raw material availability (mainly from natural brines or by-product sources), energy costs, and import duties. As of early 2025, landed prices for 99% anhydrous sodium sulfate in Pakistan range between $120 and $160 per metric ton, depending on volume and packaging.
However, focusing solely on spot price can be misleading. Smart procurement managers factor in total cost of ownership, including:
Hailei Chemical’s efficient export operations from China often enable us to offer landed pricing competitive with local Pakistani producers, while delivering superior batch-to-batch consistency and the responsive service that international buyers expect. Request a customized quotation through our sodium sulphate product page to see how we can optimize your supply chain.
Realizing the full sodium sulfate benefits in detergent manufacturing starts with rigorous quality control. Our industrial-grade anhydrous sodium sulfate meets or exceeds the following typical specifications:
| Parameter | Specification |
|---|---|
| Na2SO4 content | ≥ 99.0% |
| Water-insoluble matter | ≤ 0.05% |
| Calcium & Magnesium (as CaCO3) | ≤ 0.15% |
| Chloride (Cl) | ≤ 0.35% |
| Moisture | ≤ 0.20% |
| Whiteness | ≥ 90 (Hunter scale) |
| pH (1% solution) | 6.0–8.0 |
These parameters ensure that the filler does not introduce impurities that could yellow fabric, reduce surfactant efficiency, or create waste during processing. Consistent whiteness is especially critical for premium detergents marketed on visual appeal.
Global supply chains face increasing pressure from geopolitical events, port congestions, and container shortages. For detergent manufacturers running just-in-time production, any interruption in sodium sulfate supply can lead to costly line stoppages. We address this by:
This resilience ensures that the sodium sulfate benefits you expect—steady quality, on-time delivery—are not compromised by external disruptions.
Sustainability is no longer optional. Anhydrous sodium sulfate offers a favorable environmental profile compared to many synthetic fillers. It is naturally occurring, non-toxic, and readily biodegradable. Its use in low-phosphate or phosphate-free detergent formulations supports compliance with increasingly stringent wastewater regulations worldwide. Additionally, our production facility operates under ISO 9001 and ISO 14001 certifications, guaranteeing both quality management and environmental stewardship. Communicating these green credentials to your end consumers can become a marketing differentiator.
For formulators, translating theoretical sodium sulfate benefits into a commercial recipe requires careful balancing. Here are evidence-based starting points:
Always conduct pilot-scale trials with your specific surfactant system to verify performance. Hailei Chemical’s technical team is available to provide guidance on grade selection and process integration, helping you realize the optimal economic and functional advantages.
From its foundational sodium sulfate formula and properties to the tangible operational gains in high-volume detergent production, sodium sulfate remains an irreplaceable component of modern cleaning products. By choosing a supplier that prioritizes purity, consistency, and supply chain transparency, you unlock not just a chemical filler, but a strategic asset that elevates product quality and profit margins.
Whether you are benchmarking the sodium sulphate price in Pakistan or seeking sodium sulfate for sale with verified specifications, Hailei Chemical stands ready to become your trusted partner. Explore our full range of industrial chemicals and request a personalized quotation by visiting our sodium sulphate product page or reaching out directly at Get a Quote. Let’s engineer a cleaner, more efficient future—together.
In the formulation of powdered laundry detergents, the synergy between the surfactant and the filler defines both cost efficiency and end-use performance. When the surfactant is sds sodium dodecyl sulphate – one of the most widely used anionic surfactants – selecting the right filler becomes a critical decision for procurement managers. Sodium sulphate anhydrous (Na2SO4) has long been the filler of choice for SDS‑based detergent powders thanks to its inert nature, consistent bulk density, and processability. In this article, we explore how a 99% pure anhydrous sodium sulphate not only supports SDS functionality but also helps manufacturers meet consistent quality targets while controlling formulation costs.
Understanding what is sodium sulphate anhydrous is the first step in evaluating its role in detergent manufacture. Sodium sulphate anhydrous (CAS 7757-82-6) is the dehydrated, water‑free form of sodium sulphate. Unlike its decahydrate counterpart (Glauber’s salt), the anhydrous grade contains less than 0.5% moisture and appears as a free‑flowing white crystalline powder. With a neutral pH (6‑8 in a 5% aqueous solution) and no reactive functional groups, it remains stable under normal storage conditions and during high‑temperature spray‑drying processes used in detergent powder manufacturing.
Key physical properties of industrial‑grade sodium sulphate anhydrous include:
These characteristics make anhydrous sodium sulphate a reliable, non‑hygroscopic diluent that does not interfere with the surfactant action of SDS or other active ingredients.
When discussing sodium sulphate anhydrous uses, detergent manufacturing stands out as the largest single application. In a typical SDS‑based laundry powder, sodium sulphate may constitute 10% to 50% of the total formulation weight, depending on the desired active matter content and product positioning. Its primary function is to act as a bulking agent that standardizes the concentration of the expensive surfactant while improving powder flowability and packing properties.
Beyond serving as a simple filler, sodium sulphate contributes to:
Detergent manufacturers typically integrate sodium sulphate anhydrous into the slurry before spray‑drying or add it as a post‑blending ingredient after agglomeration. In either process, the purity and consistency of the filler directly affect the final product quality.
Sds sodium dodecyl sulphate is an anionic surfactant with a sulfate head group. Although both SDS and sodium sulphate share a sulfate moiety, they perform completely different roles. The presence of impurities in the filler – such as calcium, magnesium, or chloride ions – can interfere with the surfactant’s micellization behavior, reduce foam stability, and even cause precipitation of insoluble soap scums. A filler with ≥99% Na2SO4 purity minimizes these adverse reactions, ensuring that the SDS maintains its full detergency potential.
Even trace organic contaminants or residual free acid in lower‑grade sodium sulphate can lead to discoloration of white detergent powders, an unacceptable outcome for consumer goods. High‑purity anhydrous sodium sulphate from a qualified supplier exhibits consistent whiteness (typically >85% reflectance) and does not impart any off‑odors that could require additional perfume masking, thereby simplifying the fragrance package and lowering overall formulation costs.
Sodium sulphate is Generally Recognized as Safe (GRAS) and is listed on the EPA Safer Chemical Ingredients List. Using a high‑purity, heavy‑metal‑free grade helps detergent brands comply with international standards such as EU Detergent Regulation (EC) No 648/2004 and limits burdens on wastewater treatment, as sodium sulphate itself is readily biodegradable and presents low aquatic toxicity.
Procurement professionals sometimes encounter confusion between sodium sulphate (Na2SO4) and sodium hydrogen sulfate (NaHSO4, also known as sodium bisulfate). While both contain sodium and sulfate, their chemical behaviors and sodium hydrogen sulfate uses are entirely distinct.
Sodium hydrogen sulfate is an acidic salt (pH ~1 in solution) primarily used as a pH adjuster in swimming pools, a metal pickling agent, and a component in acidic cleaning formulations. It is never used as a detergent filler because its low pH would neutralize alkaline builders (e.g., soda ash) and could hydrolyze sensitive surfactants like SDS, rendering the detergent ineffective. In contrast, sodium sulphate anhydrous is pH neutral and chemically inert, making it a safe, compatible choice alongside SDS in powder detergents. Recognizing this distinction helps avoid costly formulation errors and ensures that the raw material ordered matches the technical requirements of the final product.
A common query among downstream users and formulators is “is sodium sulfate good for skin?” The answer depends entirely on the grade and context. Sodium sulphate itself is not classified as a skin irritant under OSHA Hazard Communication standards (HCS 2012) and is considered to have low acute dermal toxicity. Some cosmetic grades are even used in bath salts for their osmotic effects. However, the industrial anhydrous sodium sulphate supplied for detergent manufacture is not intended for direct skin application.
From a B2B handling perspective, sodium sulphate anhydrous is a fine powder that can cause mechanical eye, skin, or respiratory tract irritation if proper protective equipment is not used. A comprehensive Safety Data Sheet (SDS) – frequently confused with sds sodium dodecyl sulphate in search queries – should accompany every shipment, outlining recommended PPE (gloves, dust mask, goggles) and hygiene measures. At Hailei Chemical, we provide full compliance documentation with each batch, including a detailed SDS, to ensure safe industrial handling and workplace transparency.
When sourcing sodium sulphate anhydrous for sds sodium dodecyl sulphate detergent formulations, buyers should define clear acceptance criteria. The following specifications represent the typical requirements for high‑performance filler grades:
| Parameter | Specification | Test Method |
| Purity (Na2SO4) | ≥ 99.0% | Gravimetric / ICP |
| Moisture | ≤ 0.5% | Loss on drying, 130°C |
| Water‑Insoluble Matter | ≤ 0.05% | Filtration / Gravimetry |
| pH (5% aq. solution) | 6.0 – 8.0 | pH meter |
| Whiteness (MgO=100%) | ≥ 85% | Spectrophotometer |
| Bulk Density (g/cm³) | 1.0 – 1.2 | Tapped/tap density tester |
These parameters can be customised upon request. For detergent producers running high‑speed automatic packing lines, a consistent bulk density within a narrow range is essential to avoid under‑ or over‑filling cartons. Working with a supplier that guarantees batch‑to‑batch uniformity dramatically reduces rejection rates and production downtime.
For detergent manufacturers and chemical distributors importing bulk chemicals, supplier reliability is paramount. Our sodium sulphate anhydrous is produced under strict ISO‑certified quality management at Weifang Hailei Fine Chemical Co., Ltd., a leading Chinese exporter with decades of experience in international shipments. We offer flexible packaging options, including 50 kg HDPE bags, 1000 kg supersacks, and customised private‑label solutions, shipped from Qingdao or Shanghai ports to destinations worldwide.
Beyond delivering a consistent product, we act as a technical partner. Our team provides COA (Certificate of Analysis), MSDS, REACH registration documents, and full technical data sheets upon request. Whether you are reformulating an SDS‑based detergent or scaling up a new production line, our chemists can recommend the optimal grade of sodium sulphate anhydrous to meet your specific manufacturing conditions.
Many international buyers now require evidence of sustainable supply chains. Sodium sulphate is often recovered as a by‑product from other chemical processes (e.g., rayon manufacturing) or mined from natural deposits. We maintain full traceability from source to delivery, ensuring that your procurement aligns with corporate ESG goals.
While our focus has been on sds sodium dodecyl sulphate detergent powders, sodium sulphate anhydrous finds critical uses in other industries, reinforcing its value as a multi‑purpose commodity:
Procurement managers who consolidate purchases of sodium sulphate anhydrous for multiple departments can benefit from volume discounts and simplified logistics, a strategy increasingly adopted by large industrial groups.
Sodium sulphate anhydrous remains an indispensable ingredient in SDS (sodium dodecyl sulphate) detergent powder formulations. Its neutral chemistry, consistent density, and high purity enable formulators to build powerful cleaning products while keeping manufacturing costs in check. By choosing a supplier who understands the interplay between filler and surfactant, detergent producers can avoid quality pitfalls and streamline their raw material supply chain.
To discuss your specific requirements for sodium sulphate anhydrous and receive a competitive offer, please request a quote today. Our team is ready to support your next production run with reliable, high‑quality chemical supply.
For industrial buyers managing procurement budgets for detergent powder, glass, or pulp production, securing the right sodium sulphate wholesale price directly impacts profit margins. Whether you purchase anhydrous sodium sulphate by the container load or negotiate annual contracts, understanding market dynamics, quality specifications, and supplier landscapes is essential to making informed decisions. At Weifang Hailei Fine Chemical Co., Ltd., we supply high-purity 99% Na2SO4 to manufacturers worldwide, and this guide draws on our decades of export experience to help you optimize your sourcing strategy.
Before diving into price factors, let’s clarify exactly what sodium sulphate is and how its basic characteristics influence its use and cost.
The compound Na2SO4 goes by several names depending on its hydration state and sector. The what is sodium sulphate common name question often arises because different industries use different terms. The anhydrous form, which we produce at 99% purity, is historically called salt cake in heavy chemical industries, a name originating from the old Leblanc process where it was a byproduct of salt and sulfuric acid. The decahydrate (Na2SO4·10H2O) is universally known as Glauber’s salt, named after the 17th-century chemist who first described its medicinal properties. In mineral form, natural anhydrous sodium sulphate is called thenardite. When procurement teams search for “salt cake” or “Glauber’s salt,” they are often looking for the same core substance, though the anhydrous form preferred for detergents and glass delivers far more active material per tonne.
The colour of sodium sulphate is uniformly white in its pure state. High-purity anhydrous sodium sulphate appears as a free-flowing white crystalline powder or granular solid. Any off-white, grey, or yellowish tint typically signals the presence of iron, organic impurities, or insufficient refining. For detergent manufacturers, a bright white colour is non-negotiable because it directly affects the final powder’s appearance. Glassmakers also require iron-free sodium sulphate to avoid unwanted green or brown discolouration in container and flat glass. Always request a specification sheet that lists whiteness index (R457 brightness above 90%) along with purity.
A common formulation concern is: is sodium sulphate soluble enough for my application? Yes—sodium sulphate exhibits excellent water solubility, but with a unique temperature-dependent curve that every production manager should know. Anhydrous Na2SO4 dissolves readily in water, reaching a maximum solubility of about 49.7 g per 100 mL at 32.4°C. Below that temperature, solubility increases with heat; above 32.4°C, the solubility actually decreases slightly and the stable solid phase transitions to the anhydrous form. In practical terms, this means that your process water temperature can significantly affect dissolution rates and the risk of crystallisation fouling on equipment surfaces. For textile dyeing auxiliaries and kraft pulping liquors, maintaining process tanks above 40°C ensures complete dissolution of the sodium sulphate used as a levelling agent or cooking chemical. For detergent slurry preparation, the hydrate form can absorb moisture during storage, so bagging integrity is vital to prevent caking.
Obtaining a favorable sodium sulphate wholesale price requires awareness of the underlying cost drivers. Here are the main levers that suppliers and buyers must navigate.
The query manufacturers of sodium sulphate in india highlights one of the key production hubs. India is indeed a major producer, with companies like Nirma Limited, Atul Ltd, and several Gujarat-based operators producing large volumes, mainly as a byproduct of rayon or H-acid manufacture. Indian suppliers often export to Africa, the Middle East, and ASEAN markets, offering competitive pricing given relatively low domestic salt and labor costs. However, Indian production is frequently in the form of anhydrous salt cake with purity ranging from 96% to 99%, and some lots may contain organic traces from the rayon process, which makes them less suitable for crystal glass or high-end detergents.
China remains the world’s single largest exporter of synthetic and natural sodium sulphate. In Shandong province alone, clusters of manufacturers—including Weifang Hailei Fine Chemical’s sodium sulphate facility—leverage reliable sulfuric acid and salt supply chains, advanced dehydration technologies, and rigorous quality control to deliver consistent 99% purity, ultra-white, granular anhydrous sodium sulphate. Our position on the Bohai Rim means short transit to Qingdao port, minimising inland freight before export. When you compare landed prices from Indian versus Chinese manufacturers, factor in not just the per-tonne quote but also shipment frequency, documentation reliability, and after-sales technical support.
Smart purchasing goes beyond requesting quotes. Here are proven tactics to compress your unit cost without risking supply security.
A 99% purity guarantee is a starting point, but procurement managers need to examine the remaining 1% and the physical properties that dictate performance in specific applications.
| Parameter | Typical Value (Hailei Grade) | Importance |
|---|---|---|
| Na2SO4 content | ≥ 99.0% | Filler efficiency, glass refining |
| Water insolubles | ≤ 0.05% | Avoids specks in detergent powder, defects in glass |
| Iron (as Fe) | ≤ 0.002% (20 ppm) | Critical for colour stability in glass and white detergents |
| pH (1% solution) | 6.0 – 8.0 | Corrosion control in textile and paper processes |
| Whiteness | ≥ 90 (R457) | Ensures brilliant detergent powder appearance |
| Particle size (mesh) | Customisable 80–200 mesh | Dissolution rate, anti-segregation in blends |
When you evaluate bids, don’t simply rank by per-tonne price. A slightly more expensive supplier that offers a tailored particle size distribution reducing segregation in your detergent blend may lower your rework rate and actually improve your overall cost picture. Use Hailei Chemical’s detailed product specification sheet as a benchmark during your vendor evaluation.
Consider a mid-sized detergent plant in Southeast Asia producing 25,000 MT of laundry powder annually. High-density detergent powder formulations typically contain 20–40% sodium sulphate as an inert filler. At a raw sulfate cost of $100 per tonne, the plant spends roughly $0.5 to $1 million per year on this single ingredient.
By switching from an Indian supplier whose 97% product sometimes contained visible dark specks (organic impurities) to a Chinese 99% pure, ultra-white product, the plant eliminated the need for additional optical brighteners and cut batch rejection rates by 2%. The sodium sulphate wholesale price increased by $8 per tonne, but the savings in brightener chemicals and rework far exceeded the premium. Moreover, the consistent bulk density of the Chinese product allowed the pneumatic conveying system to operate without blockages, reducing maintenance downtime. This example illustrates why apparent price per tonne is not the only figure that matters—total cost of ownership should guide sourcing choices.
We touched on solubility earlier, but storage and handling strongly influence material efficiency. Anhydrous sodium sulphate is hygroscopic: it will absorb moisture from the air, potentially forming a hard crust or even partially converting to Glauber’s salt (decahydrate). This not only reduces the effective Na2SO4 content but also makes the powder difficult to meter accurately. Best practices include:
Understanding the solubility and hygroscopic nature of sodium sulphate also helps you assess whether a quoted product’s moisture content (typically <0.1%) is realistic and whether the supplier’s packaging will protect the material during the ocean voyage to your factory.
What is the typical sodium sulphate wholesale price range?
Depending on purity, origin, and contract size, anhydrous sodium sulphate FOB China currently ranges between $85 and $140 per metric tonne. Natural-based product tends toward the lower end, while synthetic grades with extra-low iron and high whiteness sit at the higher end. Freight and duties are additional.
How does the colour of sodium sulphate affect its applications?
The colour of sodium sulphate directly influences product acceptance in white detergents and clear glass. Any yellowish or grey tone indicates impurities that can cause rejection. Always ask for a colour/whiteness certification.
Are manufacturers of sodium sulphate in India reliable?
Many manufacturers of sodium sulphate in india are reliable and hold ISO certifications. However, their product characteristics (byproduct origins, trace organics) may differ from synthetic Chinese product. Request a technical data sheet and a retained sample from the actual lot offered.
What does the common name “salt cake” tell me about the product?
The what is sodium sulphate common name “salt cake” is a legacy term. It often implies an anhydrous form, but without modern quality checks, some buyers still associate it with lower-purity byproduct streams. Always clarify that you require technical grade, 99% Na2SO4, and not unrefined cake from a rayon plant.
How can I test is sodium sulphate soluble quickly upon arrival?
Take a 10 g sample and add to 100 mL of water at a controlled temperature, say 30°C. It should dissolve almost completely within a few minutes with gentle stirring, leaving minimal residue. Any significant insoluble fraction (beyond 0.05% spec) indicates a quality problem.
Your search for a consistent, high-purity sodium sulphate supply at a fair wholesale price ends with a trusted partner. Weifang Hailei Fine Chemical Co., Ltd. offers 99% anhydrous sodium sulphate, customised particle sizes, and full regulatory documentation (COA, MSDS, REACH) to simplify your importing process. Whether you need a single trial container or a multi-year supply agreement, our logistics team coordinates FCL shipments from Qingdao port to your nearest destination.
Compare our quality, evaluate our transparent pricing, and experience the difference of working with a manufacturer that understands your operational KPIs. Request a sodium sulphate wholesale price quote today, or explore detailed technical specifications on our sodium sulphate product page. Let’s build a cost-efficient, long-term supply partnership that strengthens your competitive edge.
In the formulation of powdered laundry detergents, the synergy between the surfactant and the filler defines both cost efficiency and end-use performance. When the surfactant is sds sodium dodecyl sulphate – one of the most widely used anionic surfactants – selecting the right filler becomes a critical decision for procurement managers. Sodium sulphate anhydrous (Na2SO4) has long been the filler of choice for SDS‑based detergent powders thanks to its inert nature, consistent bulk density, and processability. In this article, we explore how a 99% pure anhydrous sodium sulphate not only supports SDS functionality but also helps manufacturers meet consistent quality targets while controlling formulation costs.
Understanding what is sodium sulphate anhydrous is the first step in evaluating its role in detergent manufacture. Sodium sulphate anhydrous (CAS 7757-82-6) is the dehydrated, water‑free form of sodium sulphate. Unlike its decahydrate counterpart (Glauber’s salt), the anhydrous grade contains less than 0.5% moisture and appears as a free‑flowing white crystalline powder. With a neutral pH (6‑8 in a 5% aqueous solution) and no reactive functional groups, it remains stable under normal storage conditions and during high‑temperature spray‑drying processes used in detergent powder manufacturing.
Key physical properties of industrial‑grade sodium sulphate anhydrous include:
These characteristics make anhydrous sodium sulphate a reliable, non‑hygroscopic diluent that does not interfere with the surfactant action of SDS or other active ingredients.
When discussing sodium sulphate anhydrous uses, detergent manufacturing stands out as the largest single application. In a typical SDS‑based laundry powder, sodium sulphate may constitute 10% to 50% of the total formulation weight, depending on the desired active matter content and product positioning. Its primary function is to act as a bulking agent that standardizes the concentration of the expensive surfactant while improving powder flowability and packing properties.
Beyond serving as a simple filler, sodium sulphate contributes to:
Detergent manufacturers typically integrate sodium sulphate anhydrous into the slurry before spray‑drying or add it as a post‑blending ingredient after agglomeration. In either process, the purity and consistency of the filler directly affect the final product quality.
Sds sodium dodecyl sulphate is an anionic surfactant with a sulfate head group. Although both SDS and sodium sulphate share a sulfate moiety, they perform completely different roles. The presence of impurities in the filler – such as calcium, magnesium, or chloride ions – can interfere with the surfactant’s micellization behavior, reduce foam stability, and even cause precipitation of insoluble soap scums. A filler with ≥99% Na2SO4 purity minimizes these adverse reactions, ensuring that the SDS maintains its full detergency potential.
Even trace organic contaminants or residual free acid in lower‑grade sodium sulphate can lead to discoloration of white detergent powders, an unacceptable outcome for consumer goods. High‑purity anhydrous sodium sulphate from a qualified supplier exhibits consistent whiteness (typically >85% reflectance) and does not impart any off‑odors that could require additional perfume masking, thereby simplifying the fragrance package and lowering overall formulation costs.
Sodium sulphate is Generally Recognized as Safe (GRAS) and is listed on the EPA Safer Chemical Ingredients List. Using a high‑purity, heavy‑metal‑free grade helps detergent brands comply with international standards such as EU Detergent Regulation (EC) No 648/2004 and limits burdens on wastewater treatment, as sodium sulphate itself is readily biodegradable and presents low aquatic toxicity.
Procurement professionals sometimes encounter confusion between sodium sulphate (Na2SO4) and sodium hydrogen sulfate (NaHSO4, also known as sodium bisulfate). While both contain sodium and sulfate, their chemical behaviors and sodium hydrogen sulfate uses are entirely distinct.
Sodium hydrogen sulfate is an acidic salt (pH ~1 in solution) primarily used as a pH adjuster in swimming pools, a metal pickling agent, and a component in acidic cleaning formulations. It is never used as a detergent filler because its low pH would neutralize alkaline builders (e.g., soda ash) and could hydrolyze sensitive surfactants like SDS, rendering the detergent ineffective. In contrast, sodium sulphate anhydrous is pH neutral and chemically inert, making it a safe, compatible choice alongside SDS in powder detergents. Recognizing this distinction helps avoid costly formulation errors and ensures that the raw material ordered matches the technical requirements of the final product.
A common query among downstream users and formulators is “is sodium sulfate good for skin?” The answer depends entirely on the grade and context. Sodium sulphate itself is not classified as a skin irritant under OSHA Hazard Communication standards (HCS 2012) and is considered to have low acute dermal toxicity. Some cosmetic grades are even used in bath salts for their osmotic effects. However, the industrial anhydrous sodium sulphate supplied for detergent manufacture is not intended for direct skin application.
From a B2B handling perspective, sodium sulphate anhydrous is a fine powder that can cause mechanical eye, skin, or respiratory tract irritation if proper protective equipment is not used. A comprehensive Safety Data Sheet (SDS) – frequently confused with sds sodium dodecyl sulphate in search queries – should accompany every shipment, outlining recommended PPE (gloves, dust mask, goggles) and hygiene measures. At Hailei Chemical, we provide full compliance documentation with each batch, including a detailed SDS, to ensure safe industrial handling and workplace transparency.
When sourcing sodium sulphate anhydrous for sds sodium dodecyl sulphate detergent formulations, buyers should define clear acceptance criteria. The following specifications represent the typical requirements for high‑performance filler grades:
| Parameter | Specification | Test Method |
| Purity (Na2SO4) | ≥ 99.0% | Gravimetric / ICP |
| Moisture | ≤ 0.5% | Loss on drying, 130°C |
| Water‑Insoluble Matter | ≤ 0.05% | Filtration / Gravimetry |
| pH (5% aq. solution) | 6.0 – 8.0 | pH meter |
| Whiteness (MgO=100%) | ≥ 85% | Spectrophotometer |
| Bulk Density (g/cm³) | 1.0 – 1.2 | Tapped/tap density tester |
These parameters can be customised upon request. For detergent producers running high‑speed automatic packing lines, a consistent bulk density within a narrow range is essential to avoid under‑ or over‑filling cartons. Working with a supplier that guarantees batch‑to‑batch uniformity dramatically reduces rejection rates and production downtime.
For detergent manufacturers and chemical distributors importing bulk chemicals, supplier reliability is paramount. Our sodium sulphate anhydrous is produced under strict ISO‑certified quality management at Weifang Hailei Fine Chemical Co., Ltd., a leading Chinese exporter with decades of experience in international shipments. We offer flexible packaging options, including 50 kg HDPE bags, 1000 kg supersacks, and customised private‑label solutions, shipped from Qingdao or Shanghai ports to destinations worldwide.
Beyond delivering a consistent product, we act as a technical partner. Our team provides COA (Certificate of Analysis), MSDS, REACH registration documents, and full technical data sheets upon request. Whether you are reformulating an SDS‑based detergent or scaling up a new production line, our chemists can recommend the optimal grade of sodium sulphate anhydrous to meet your specific manufacturing conditions.
Many international buyers now require evidence of sustainable supply chains. Sodium sulphate is often recovered as a by‑product from other chemical processes (e.g., rayon manufacturing) or mined from natural deposits. We maintain full traceability from source to delivery, ensuring that your procurement aligns with corporate ESG goals.
While our focus has been on sds sodium dodecyl sulphate detergent powders, sodium sulphate anhydrous finds critical uses in other industries, reinforcing its value as a multi‑purpose commodity:
Procurement managers who consolidate purchases of sodium sulphate anhydrous for multiple departments can benefit from volume discounts and simplified logistics, a strategy increasingly adopted by large industrial groups.
Sodium sulphate anhydrous remains an indispensable ingredient in SDS (sodium dodecyl sulphate) detergent powder formulations. Its neutral chemistry, consistent density, and high purity enable formulators to build powerful cleaning products while keeping manufacturing costs in check. By choosing a supplier who understands the interplay between filler and surfactant, detergent producers can avoid quality pitfalls and streamline their raw material supply chain.
To discuss your specific requirements for sodium sulphate anhydrous and receive a competitive offer, please request a quote today. Our team is ready to support your next production run with reliable, high‑quality chemical supply.
For industrial buyers managing procurement budgets for detergent powder, glass, or pulp production, securing the right sodium sulphate wholesale price directly impacts profit margins. Whether you purchase anhydrous sodium sulphate by the container load or negotiate annual contracts, understanding market dynamics, quality specifications, and supplier landscapes is essential to making informed decisions. At Weifang Hailei Fine Chemical Co., Ltd., we supply high-purity 99% Na2SO4 to manufacturers worldwide, and this guide draws on our decades of export experience to help you optimize your sourcing strategy.
Before diving into price factors, let’s clarify exactly what sodium sulphate is and how its basic characteristics influence its use and cost.
The compound Na2SO4 goes by several names depending on its hydration state and sector. The what is sodium sulphate common name question often arises because different industries use different terms. The anhydrous form, which we produce at 99% purity, is historically called salt cake in heavy chemical industries, a name originating from the old Leblanc process where it was a byproduct of salt and sulfuric acid. The decahydrate (Na2SO4·10H2O) is universally known as Glauber’s salt, named after the 17th-century chemist who first described its medicinal properties. In mineral form, natural anhydrous sodium sulphate is called thenardite. When procurement teams search for “salt cake” or “Glauber’s salt,” they are often looking for the same core substance, though the anhydrous form preferred for detergents and glass delivers far more active material per tonne.
The colour of sodium sulphate is uniformly white in its pure state. High-purity anhydrous sodium sulphate appears as a free-flowing white crystalline powder or granular solid. Any off-white, grey, or yellowish tint typically signals the presence of iron, organic impurities, or insufficient refining. For detergent manufacturers, a bright white colour is non-negotiable because it directly affects the final powder’s appearance. Glassmakers also require iron-free sodium sulphate to avoid unwanted green or brown discolouration in container and flat glass. Always request a specification sheet that lists whiteness index (R457 brightness above 90%) along with purity.
A common formulation concern is: is sodium sulphate soluble enough for my application? Yes—sodium sulphate exhibits excellent water solubility, but with a unique temperature-dependent curve that every production manager should know. Anhydrous Na2SO4 dissolves readily in water, reaching a maximum solubility of about 49.7 g per 100 mL at 32.4°C. Below that temperature, solubility increases with heat; above 32.4°C, the solubility actually decreases slightly and the stable solid phase transitions to the anhydrous form. In practical terms, this means that your process water temperature can significantly affect dissolution rates and the risk of crystallisation fouling on equipment surfaces. For textile dyeing auxiliaries and kraft pulping liquors, maintaining process tanks above 40°C ensures complete dissolution of the sodium sulphate used as a levelling agent or cooking chemical. For detergent slurry preparation, the hydrate form can absorb moisture during storage, so bagging integrity is vital to prevent caking.
Obtaining a favorable sodium sulphate wholesale price requires awareness of the underlying cost drivers. Here are the main levers that suppliers and buyers must navigate.
The query manufacturers of sodium sulphate in india highlights one of the key production hubs. India is indeed a major producer, with companies like Nirma Limited, Atul Ltd, and several Gujarat-based operators producing large volumes, mainly as a byproduct of rayon or H-acid manufacture. Indian suppliers often export to Africa, the Middle East, and ASEAN markets, offering competitive pricing given relatively low domestic salt and labor costs. However, Indian production is frequently in the form of anhydrous salt cake with purity ranging from 96% to 99%, and some lots may contain organic traces from the rayon process, which makes them less suitable for crystal glass or high-end detergents.
China remains the world’s single largest exporter of synthetic and natural sodium sulphate. In Shandong province alone, clusters of manufacturers—including Weifang Hailei Fine Chemical’s sodium sulphate facility—leverage reliable sulfuric acid and salt supply chains, advanced dehydration technologies, and rigorous quality control to deliver consistent 99% purity, ultra-white, granular anhydrous sodium sulphate. Our position on the Bohai Rim means short transit to Qingdao port, minimising inland freight before export. When you compare landed prices from Indian versus Chinese manufacturers, factor in not just the per-tonne quote but also shipment frequency, documentation reliability, and after-sales technical support.
Smart purchasing goes beyond requesting quotes. Here are proven tactics to compress your unit cost without risking supply security.
A 99% purity guarantee is a starting point, but procurement managers need to examine the remaining 1% and the physical properties that dictate performance in specific applications.
| Parameter | Typical Value (Hailei Grade) | Importance |
|---|---|---|
| Na2SO4 content | ≥ 99.0% | Filler efficiency, glass refining |
| Water insolubles | ≤ 0.05% | Avoids specks in detergent powder, defects in glass |
| Iron (as Fe) | ≤ 0.002% (20 ppm) | Critical for colour stability in glass and white detergents |
| pH (1% solution) | 6.0 – 8.0 | Corrosion control in textile and paper processes |
| Whiteness | ≥ 90 (R457) | Ensures brilliant detergent powder appearance |
| Particle size (mesh) | Customisable 80–200 mesh | Dissolution rate, anti-segregation in blends |
When you evaluate bids, don’t simply rank by per-tonne price. A slightly more expensive supplier that offers a tailored particle size distribution reducing segregation in your detergent blend may lower your rework rate and actually improve your overall cost picture. Use Hailei Chemical’s detailed product specification sheet as a benchmark during your vendor evaluation.
Consider a mid-sized detergent plant in Southeast Asia producing 25,000 MT of laundry powder annually. High-density detergent powder formulations typically contain 20–40% sodium sulphate as an inert filler. At a raw sulfate cost of $100 per tonne, the plant spends roughly $0.5 to $1 million per year on this single ingredient.
By switching from an Indian supplier whose 97% product sometimes contained visible dark specks (organic impurities) to a Chinese 99% pure, ultra-white product, the plant eliminated the need for additional optical brighteners and cut batch rejection rates by 2%. The sodium sulphate wholesale price increased by $8 per tonne, but the savings in brightener chemicals and rework far exceeded the premium. Moreover, the consistent bulk density of the Chinese product allowed the pneumatic conveying system to operate without blockages, reducing maintenance downtime. This example illustrates why apparent price per tonne is not the only figure that matters—total cost of ownership should guide sourcing choices.
We touched on solubility earlier, but storage and handling strongly influence material efficiency. Anhydrous sodium sulphate is hygroscopic: it will absorb moisture from the air, potentially forming a hard crust or even partially converting to Glauber’s salt (decahydrate). This not only reduces the effective Na2SO4 content but also makes the powder difficult to meter accurately. Best practices include:
Understanding the solubility and hygroscopic nature of sodium sulphate also helps you assess whether a quoted product’s moisture content (typically <0.1%) is realistic and whether the supplier’s packaging will protect the material during the ocean voyage to your factory.
What is the typical sodium sulphate wholesale price range?
Depending on purity, origin, and contract size, anhydrous sodium sulphate FOB China currently ranges between $85 and $140 per metric tonne. Natural-based product tends toward the lower end, while synthetic grades with extra-low iron and high whiteness sit at the higher end. Freight and duties are additional.
How does the colour of sodium sulphate affect its applications?
The colour of sodium sulphate directly influences product acceptance in white detergents and clear glass. Any yellowish or grey tone indicates impurities that can cause rejection. Always ask for a colour/whiteness certification.
Are manufacturers of sodium sulphate in India reliable?
Many manufacturers of sodium sulphate in india are reliable and hold ISO certifications. However, their product characteristics (byproduct origins, trace organics) may differ from synthetic Chinese product. Request a technical data sheet and a retained sample from the actual lot offered.
What does the common name “salt cake” tell me about the product?
The what is sodium sulphate common name “salt cake” is a legacy term. It often implies an anhydrous form, but without modern quality checks, some buyers still associate it with lower-purity byproduct streams. Always clarify that you require technical grade, 99% Na2SO4, and not unrefined cake from a rayon plant.
How can I test is sodium sulphate soluble quickly upon arrival?
Take a 10 g sample and add to 100 mL of water at a controlled temperature, say 30°C. It should dissolve almost completely within a few minutes with gentle stirring, leaving minimal residue. Any significant insoluble fraction (beyond 0.05% spec) indicates a quality problem.
Your search for a consistent, high-purity sodium sulphate supply at a fair wholesale price ends with a trusted partner. Weifang Hailei Fine Chemical Co., Ltd. offers 99% anhydrous sodium sulphate, customised particle sizes, and full regulatory documentation (COA, MSDS, REACH) to simplify your importing process. Whether you need a single trial container or a multi-year supply agreement, our logistics team coordinates FCL shipments from Qingdao port to your nearest destination.
Compare our quality, evaluate our transparent pricing, and experience the difference of working with a manufacturer that understands your operational KPIs. Request a sodium sulphate wholesale price quote today, or explore detailed technical specifications on our sodium sulphate product page. Let’s build a cost-efficient, long-term supply partnership that strengthens your competitive edge.
In the formulation of powdered laundry detergents, the synergy between the surfactant and the filler defines both cost efficiency and end-use performance. When the surfactant is sds sodium dodecyl sulphate – one of the most widely used anionic surfactants – selecting the right filler becomes a critical decision for procurement managers. Sodium sulphate anhydrous (Na2SO4) has long been the filler of choice for SDS‑based detergent powders thanks to its inert nature, consistent bulk density, and processability. In this article, we explore how a 99% pure anhydrous sodium sulphate not only supports SDS functionality but also helps manufacturers meet consistent quality targets while controlling formulation costs.
Understanding what is sodium sulphate anhydrous is the first step in evaluating its role in detergent manufacture. Sodium sulphate anhydrous (CAS 7757-82-6) is the dehydrated, water‑free form of sodium sulphate. Unlike its decahydrate counterpart (Glauber’s salt), the anhydrous grade contains less than 0.5% moisture and appears as a free‑flowing white crystalline powder. With a neutral pH (6‑8 in a 5% aqueous solution) and no reactive functional groups, it remains stable under normal storage conditions and during high‑temperature spray‑drying processes used in detergent powder manufacturing.
Key physical properties of industrial‑grade sodium sulphate anhydrous include:
These characteristics make anhydrous sodium sulphate a reliable, non‑hygroscopic diluent that does not interfere with the surfactant action of SDS or other active ingredients.
When discussing sodium sulphate anhydrous uses, detergent manufacturing stands out as the largest single application. In a typical SDS‑based laundry powder, sodium sulphate may constitute 10% to 50% of the total formulation weight, depending on the desired active matter content and product positioning. Its primary function is to act as a bulking agent that standardizes the concentration of the expensive surfactant while improving powder flowability and packing properties.
Beyond serving as a simple filler, sodium sulphate contributes to:
Detergent manufacturers typically integrate sodium sulphate anhydrous into the slurry before spray‑drying or add it as a post‑blending ingredient after agglomeration. In either process, the purity and consistency of the filler directly affect the final product quality.
Sds sodium dodecyl sulphate is an anionic surfactant with a sulfate head group. Although both SDS and sodium sulphate share a sulfate moiety, they perform completely different roles. The presence of impurities in the filler – such as calcium, magnesium, or chloride ions – can interfere with the surfactant’s micellization behavior, reduce foam stability, and even cause precipitation of insoluble soap scums. A filler with ≥99% Na2SO4 purity minimizes these adverse reactions, ensuring that the SDS maintains its full detergency potential.
Even trace organic contaminants or residual free acid in lower‑grade sodium sulphate can lead to discoloration of white detergent powders, an unacceptable outcome for consumer goods. High‑purity anhydrous sodium sulphate from a qualified supplier exhibits consistent whiteness (typically >85% reflectance) and does not impart any off‑odors that could require additional perfume masking, thereby simplifying the fragrance package and lowering overall formulation costs.
Sodium sulphate is Generally Recognized as Safe (GRAS) and is listed on the EPA Safer Chemical Ingredients List. Using a high‑purity, heavy‑metal‑free grade helps detergent brands comply with international standards such as EU Detergent Regulation (EC) No 648/2004 and limits burdens on wastewater treatment, as sodium sulphate itself is readily biodegradable and presents low aquatic toxicity.
Procurement professionals sometimes encounter confusion between sodium sulphate (Na2SO4) and sodium hydrogen sulfate (NaHSO4, also known as sodium bisulfate). While both contain sodium and sulfate, their chemical behaviors and sodium hydrogen sulfate uses are entirely distinct.
Sodium hydrogen sulfate is an acidic salt (pH ~1 in solution) primarily used as a pH adjuster in swimming pools, a metal pickling agent, and a component in acidic cleaning formulations. It is never used as a detergent filler because its low pH would neutralize alkaline builders (e.g., soda ash) and could hydrolyze sensitive surfactants like SDS, rendering the detergent ineffective. In contrast, sodium sulphate anhydrous is pH neutral and chemically inert, making it a safe, compatible choice alongside SDS in powder detergents. Recognizing this distinction helps avoid costly formulation errors and ensures that the raw material ordered matches the technical requirements of the final product.
A common query among downstream users and formulators is “is sodium sulfate good for skin?” The answer depends entirely on the grade and context. Sodium sulphate itself is not classified as a skin irritant under OSHA Hazard Communication standards (HCS 2012) and is considered to have low acute dermal toxicity. Some cosmetic grades are even used in bath salts for their osmotic effects. However, the industrial anhydrous sodium sulphate supplied for detergent manufacture is not intended for direct skin application.
From a B2B handling perspective, sodium sulphate anhydrous is a fine powder that can cause mechanical eye, skin, or respiratory tract irritation if proper protective equipment is not used. A comprehensive Safety Data Sheet (SDS) – frequently confused with sds sodium dodecyl sulphate in search queries – should accompany every shipment, outlining recommended PPE (gloves, dust mask, goggles) and hygiene measures. At Hailei Chemical, we provide full compliance documentation with each batch, including a detailed SDS, to ensure safe industrial handling and workplace transparency.
When sourcing sodium sulphate anhydrous for sds sodium dodecyl sulphate detergent formulations, buyers should define clear acceptance criteria. The following specifications represent the typical requirements for high‑performance filler grades:
| Parameter | Specification | Test Method |
| Purity (Na2SO4) | ≥ 99.0% | Gravimetric / ICP |
| Moisture | ≤ 0.5% | Loss on drying, 130°C |
| Water‑Insoluble Matter | ≤ 0.05% | Filtration / Gravimetry |
| pH (5% aq. solution) | 6.0 – 8.0 | pH meter |
| Whiteness (MgO=100%) | ≥ 85% | Spectrophotometer |
| Bulk Density (g/cm³) | 1.0 – 1.2 | Tapped/tap density tester |
These parameters can be customised upon request. For detergent producers running high‑speed automatic packing lines, a consistent bulk density within a narrow range is essential to avoid under‑ or over‑filling cartons. Working with a supplier that guarantees batch‑to‑batch uniformity dramatically reduces rejection rates and production downtime.
For detergent manufacturers and chemical distributors importing bulk chemicals, supplier reliability is paramount. Our sodium sulphate anhydrous is produced under strict ISO‑certified quality management at Weifang Hailei Fine Chemical Co., Ltd., a leading Chinese exporter with decades of experience in international shipments. We offer flexible packaging options, including 50 kg HDPE bags, 1000 kg supersacks, and customised private‑label solutions, shipped from Qingdao or Shanghai ports to destinations worldwide.
Beyond delivering a consistent product, we act as a technical partner. Our team provides COA (Certificate of Analysis), MSDS, REACH registration documents, and full technical data sheets upon request. Whether you are reformulating an SDS‑based detergent or scaling up a new production line, our chemists can recommend the optimal grade of sodium sulphate anhydrous to meet your specific manufacturing conditions.
Many international buyers now require evidence of sustainable supply chains. Sodium sulphate is often recovered as a by‑product from other chemical processes (e.g., rayon manufacturing) or mined from natural deposits. We maintain full traceability from source to delivery, ensuring that your procurement aligns with corporate ESG goals.
While our focus has been on sds sodium dodecyl sulphate detergent powders, sodium sulphate anhydrous finds critical uses in other industries, reinforcing its value as a multi‑purpose commodity:
Procurement managers who consolidate purchases of sodium sulphate anhydrous for multiple departments can benefit from volume discounts and simplified logistics, a strategy increasingly adopted by large industrial groups.
Sodium sulphate anhydrous remains an indispensable ingredient in SDS (sodium dodecyl sulphate) detergent powder formulations. Its neutral chemistry, consistent density, and high purity enable formulators to build powerful cleaning products while keeping manufacturing costs in check. By choosing a supplier who understands the interplay between filler and surfactant, detergent producers can avoid quality pitfalls and streamline their raw material supply chain.
To discuss your specific requirements for sodium sulphate anhydrous and receive a competitive offer, please request a quote today. Our team is ready to support your next production run with reliable, high‑quality chemical supply.
For industrial buyers managing procurement budgets for detergent powder, glass, or pulp production, securing the right sodium sulphate wholesale price directly impacts profit margins. Whether you purchase anhydrous sodium sulphate by the container load or negotiate annual contracts, understanding market dynamics, quality specifications, and supplier landscapes is essential to making informed decisions. At Weifang Hailei Fine Chemical Co., Ltd., we supply high-purity 99% Na2SO4 to manufacturers worldwide, and this guide draws on our decades of export experience to help you optimize your sourcing strategy.
Before diving into price factors, let’s clarify exactly what sodium sulphate is and how its basic characteristics influence its use and cost.
The compound Na2SO4 goes by several names depending on its hydration state and sector. The what is sodium sulphate common name question often arises because different industries use different terms. The anhydrous form, which we produce at 99% purity, is historically called salt cake in heavy chemical industries, a name originating from the old Leblanc process where it was a byproduct of salt and sulfuric acid. The decahydrate (Na2SO4·10H2O) is universally known as Glauber’s salt, named after the 17th-century chemist who first described its medicinal properties. In mineral form, natural anhydrous sodium sulphate is called thenardite. When procurement teams search for “salt cake” or “Glauber’s salt,” they are often looking for the same core substance, though the anhydrous form preferred for detergents and glass delivers far more active material per tonne.
The colour of sodium sulphate is uniformly white in its pure state. High-purity anhydrous sodium sulphate appears as a free-flowing white crystalline powder or granular solid. Any off-white, grey, or yellowish tint typically signals the presence of iron, organic impurities, or insufficient refining. For detergent manufacturers, a bright white colour is non-negotiable because it directly affects the final powder’s appearance. Glassmakers also require iron-free sodium sulphate to avoid unwanted green or brown discolouration in container and flat glass. Always request a specification sheet that lists whiteness index (R457 brightness above 90%) along with purity.
A common formulation concern is: is sodium sulphate soluble enough for my application? Yes—sodium sulphate exhibits excellent water solubility, but with a unique temperature-dependent curve that every production manager should know. Anhydrous Na2SO4 dissolves readily in water, reaching a maximum solubility of about 49.7 g per 100 mL at 32.4°C. Below that temperature, solubility increases with heat; above 32.4°C, the solubility actually decreases slightly and the stable solid phase transitions to the anhydrous form. In practical terms, this means that your process water temperature can significantly affect dissolution rates and the risk of crystallisation fouling on equipment surfaces. For textile dyeing auxiliaries and kraft pulping liquors, maintaining process tanks above 40°C ensures complete dissolution of the sodium sulphate used as a levelling agent or cooking chemical. For detergent slurry preparation, the hydrate form can absorb moisture during storage, so bagging integrity is vital to prevent caking.
Obtaining a favorable sodium sulphate wholesale price requires awareness of the underlying cost drivers. Here are the main levers that suppliers and buyers must navigate.
The query manufacturers of sodium sulphate in india highlights one of the key production hubs. India is indeed a major producer, with companies like Nirma Limited, Atul Ltd, and several Gujarat-based operators producing large volumes, mainly as a byproduct of rayon or H-acid manufacture. Indian suppliers often export to Africa, the Middle East, and ASEAN markets, offering competitive pricing given relatively low domestic salt and labor costs. However, Indian production is frequently in the form of anhydrous salt cake with purity ranging from 96% to 99%, and some lots may contain organic traces from the rayon process, which makes them less suitable for crystal glass or high-end detergents.
China remains the world’s single largest exporter of synthetic and natural sodium sulphate. In Shandong province alone, clusters of manufacturers—including Weifang Hailei Fine Chemical’s sodium sulphate facility—leverage reliable sulfuric acid and salt supply chains, advanced dehydration technologies, and rigorous quality control to deliver consistent 99% purity, ultra-white, granular anhydrous sodium sulphate. Our position on the Bohai Rim means short transit to Qingdao port, minimising inland freight before export. When you compare landed prices from Indian versus Chinese manufacturers, factor in not just the per-tonne quote but also shipment frequency, documentation reliability, and after-sales technical support.
Smart purchasing goes beyond requesting quotes. Here are proven tactics to compress your unit cost without risking supply security.
A 99% purity guarantee is a starting point, but procurement managers need to examine the remaining 1% and the physical properties that dictate performance in specific applications.
| Parameter | Typical Value (Hailei Grade) | Importance |
|---|---|---|
| Na2SO4 content | ≥ 99.0% | Filler efficiency, glass refining |
| Water insolubles | ≤ 0.05% | Avoids specks in detergent powder, defects in glass |
| Iron (as Fe) | ≤ 0.002% (20 ppm) | Critical for colour stability in glass and white detergents |
| pH (1% solution) | 6.0 – 8.0 | Corrosion control in textile and paper processes |
| Whiteness | ≥ 90 (R457) | Ensures brilliant detergent powder appearance |
| Particle size (mesh) | Customisable 80–200 mesh | Dissolution rate, anti-segregation in blends |
When you evaluate bids, don’t simply rank by per-tonne price. A slightly more expensive supplier that offers a tailored particle size distribution reducing segregation in your detergent blend may lower your rework rate and actually improve your overall cost picture. Use Hailei Chemical’s detailed product specification sheet as a benchmark during your vendor evaluation.
Consider a mid-sized detergent plant in Southeast Asia producing 25,000 MT of laundry powder annually. High-density detergent powder formulations typically contain 20–40% sodium sulphate as an inert filler. At a raw sulfate cost of $100 per tonne, the plant spends roughly $0.5 to $1 million per year on this single ingredient.
By switching from an Indian supplier whose 97% product sometimes contained visible dark specks (organic impurities) to a Chinese 99% pure, ultra-white product, the plant eliminated the need for additional optical brighteners and cut batch rejection rates by 2%. The sodium sulphate wholesale price increased by $8 per tonne, but the savings in brightener chemicals and rework far exceeded the premium. Moreover, the consistent bulk density of the Chinese product allowed the pneumatic conveying system to operate without blockages, reducing maintenance downtime. This example illustrates why apparent price per tonne is not the only figure that matters—total cost of ownership should guide sourcing choices.
We touched on solubility earlier, but storage and handling strongly influence material efficiency. Anhydrous sodium sulphate is hygroscopic: it will absorb moisture from the air, potentially forming a hard crust or even partially converting to Glauber’s salt (decahydrate). This not only reduces the effective Na2SO4 content but also makes the powder difficult to meter accurately. Best practices include:
Understanding the solubility and hygroscopic nature of sodium sulphate also helps you assess whether a quoted product’s moisture content (typically <0.1%) is realistic and whether the supplier’s packaging will protect the material during the ocean voyage to your factory.
What is the typical sodium sulphate wholesale price range?
Depending on purity, origin, and contract size, anhydrous sodium sulphate FOB China currently ranges between $85 and $140 per metric tonne. Natural-based product tends toward the lower end, while synthetic grades with extra-low iron and high whiteness sit at the higher end. Freight and duties are additional.
How does the colour of sodium sulphate affect its applications?
The colour of sodium sulphate directly influences product acceptance in white detergents and clear glass. Any yellowish or grey tone indicates impurities that can cause rejection. Always ask for a colour/whiteness certification.
Are manufacturers of sodium sulphate in India reliable?
Many manufacturers of sodium sulphate in india are reliable and hold ISO certifications. However, their product characteristics (byproduct origins, trace organics) may differ from synthetic Chinese product. Request a technical data sheet and a retained sample from the actual lot offered.
What does the common name “salt cake” tell me about the product?
The what is sodium sulphate common name “salt cake” is a legacy term. It often implies an anhydrous form, but without modern quality checks, some buyers still associate it with lower-purity byproduct streams. Always clarify that you require technical grade, 99% Na2SO4, and not unrefined cake from a rayon plant.
How can I test is sodium sulphate soluble quickly upon arrival?
Take a 10 g sample and add to 100 mL of water at a controlled temperature, say 30°C. It should dissolve almost completely within a few minutes with gentle stirring, leaving minimal residue. Any significant insoluble fraction (beyond 0.05% spec) indicates a quality problem.
Your search for a consistent, high-purity sodium sulphate supply at a fair wholesale price ends with a trusted partner. Weifang Hailei Fine Chemical Co., Ltd. offers 99% anhydrous sodium sulphate, customised particle sizes, and full regulatory documentation (COA, MSDS, REACH) to simplify your importing process. Whether you need a single trial container or a multi-year supply agreement, our logistics team coordinates FCL shipments from Qingdao port to your nearest destination.
Compare our quality, evaluate our transparent pricing, and experience the difference of working with a manufacturer that understands your operational KPIs. Request a sodium sulphate wholesale price quote today, or explore detailed technical specifications on our sodium sulphate product page. Let’s build a cost-efficient, long-term supply partnership that strengthens your competitive edge.