For procurement professionals sourcing sodium sulphate (Na₂SO₄) for detergent, glass, or textile applications, global supply chains often lead back to India’s vibrant chemical hub in Gujarat. Home to a dense cluster of sodium sulphide manufacturers in Gujarat, this region provides critical insights into the reliability, cost-effectiveness, and quality standards that define today’s sodium sulphate market. Understanding the interconnectedness of chemical manufacturing in Gujarat can help buyers secure a consistent supply of anhydrous sodium sulphate with 99% purity—the benchmark for industrial bulk usage.
Sodium sulphate, a neutral inorganic salt, is a workhorse chemical that rarely makes headlines but underpins several billion-dollar sectors. As a buyer, knowing its primary functions helps you align specifications with end-use performance. The anhydrous grade (Na₂SO₄, purity ≥99%) is particularly valued for its inertness, low cost, and compatibility with a wide range of industrial processes.
In the detergent industry, sodium sulphate functions primarily as a filler to standardize formulation volume and reduce cost per wash. High-purity anhydrous sodium sulphate ensures free-flowing powder, prevents caking, and maintains the stability of surfactants. Leading detergent manufacturers in Asia and the Middle East depend on sodium sulphate as a cost-efficient bulking agent without interfering with cleaning efficacy. By blending sodium sulphate with linear alkylbenzene sulphonate (LAS) and other actives, formulators achieve the desired bulk density while keeping the product affordable. Hailei Chemical’s sodium sulphate is ground to optimal particle size distribution, minimizing dusting during mixing and ensuring uniform distribution in detergent powder blends.
In float glass and container glass production, sodium sulphate serves as a fining and fluxing agent. It lowers the melting temperature of silica sand, reducing energy consumption—a critical factor when natural gas prices fluctuate. Moreover, sodium sulphate helps oxidize iron impurities, which can otherwise tint the glass green. At typical addition rates of 0.5–1.5% of batch weight, anhydrous sodium sulphate improves refining and helps remove bubbles. Glass factories demand consistent purity (≥99%) and low chloride content to avoid refractory corrosion. As Gujarat’s chemical ecosystem supplies raw soda ash and sodium sulphate together, bulk shipping from India often reduces logistics costs for large-scale glassmakers in Africa and Southeast Asia.
Textile mills rely on sodium sulphate as a dyeing auxiliary, especially in reactive dyeing of cotton. Unlike common salt (sodium chloride) that merely drives dye exhaustion, sodium sulphate promotes more even dye uptake, reducing the risk of unlevel shading on large fabric runs. This is where the phrase “salt to set dye in fabric” enters the conversation—though historically referring to sodium chloride, low-liquor ratio dyeing processes now favor sodium sulphate to minimize corrosion in stainless steel equipment. By buffering ionic strength, sodium sulphate allows precise control over dye fixation, which is particularly critical for shades of turquoise and reactive blacks. The anhydrous form dissolves readily in warm water, reducing batch time and improving productivity. With the textile hub of Surat in Gujarat, many dyehouses source sodium sulphate directly from nearby manufacturers, creating a benchmark for rapid delivery that global buyers can emulate when dealing with Chinese exporters like Hailei Chemical.
The kraft pulping process uses sodium sulphate as a make-up chemical in the recovery boiler to compensate for sodium and sulfur losses. By adding sodium sulphate to the black liquor before combustion, pulp mills maintain the alkalinity of the white liquor and reduce the need for fresh caustic soda. Anhydrous grades with minimal insolubles are essential to avoid clogging nozzles in the recovery boiler. This closed-loop chemistry makes sodium sulphate a sustainability enabler, and its consumption rises with the global demand for packaging paper and containerboard. Procurement managers in the pulp and paper industry typically contract quarterly volumes with strict specifications for iron and chloride content—areas where Hailei Chemical’s rigorous QC processes offer peace of mind.
Beyond its direct applications, sodium sulphate acts as a starting material for manufacturing sodium sulfide, sodium silicate, and various barium compounds. In the production of sodium sulfide—a crucial reagent for leather tanning and ore flotation—sodium sulphate undergoes carbothermic reduction in rotary kilns. This is where the synergy with sodium sulphide manufacturers in Gujarat becomes evident: many integrated chemical plants in the region co-produce these sulphates and sulphides, creating a reliable supply chain that stabilizes raw material availability and pricing for global buyers.
Next, we examine the physical properties that determine sodium sulphate’s handling and storage requirements.
When specifying sodium sulphate for industrial use, understanding its physical properties is non-negotiable. The table below summarizes key parameters of anhydrous sodium sulphate (≥99% purity) relevant to logistics, storage, and processing.
| Property | Value | Significance for Buyers |
|---|---|---|
| Appearance | White crystalline powder or granules | Indicates high purity; yellowish tint often signals iron contamination. |
| Molecular Weight | 142.04 g/mol | Used in stoichiometric calculations for chemical reactions. |
| Density | 2.664 g/cm³ (anhydrous) | Affects packaging and shipping volumes; higher density reduces freight cost per ton. |
| Melting Point | 884°C | High thermal stability suits glass furnace and calcination uses. |
| Solubility in Water | ~28.1 g/100 mL at 25°C (anhydrous) | Dissolution rate important for dyeing and detergent formulation; anhydrous form dissolves slower than decahydrate but remains adequate. |
| Hygroscopicity | Low (anhydrous grade), but decahydrate effloresces in dry air | Anhydrous sodium sulphate can absorb moisture under humid conditions, so sealed packaging is essential. Storage in covered, dry warehouses recommended. |
| pH (5% solution) | Neutral (6.0–8.0) | Compatibility with other formulation ingredients; no corrosive impact. |
| Bulk Density (loose) | 1.2–1.4 g/cm³ (granular form) | Controls silo design and conveying systems; Hailei Chemical offers grade-specific densities upon request. |
These physical properties of sodium sulphate directly influence packaging choices—typically 25 kg, 50 kg HDPE bags with inner liners, or 1-ton jumbo bags for bulk users. For sea freight from China, moisture barrier pallet wrap and container desiccants prevent caking during transit, safeguarding the 99% purity that industrial buyers demand.
The price of sodium sulphate per kg is rarely static, driven by raw material availability (sulfuric acid, salt), energy costs, and logistics. In 2025, bulk prices for anhydrous sodium sulphate (99% purity) ex-works Asia range between USD 0.10 and USD 0.25 per kg, depending on volume, region, and contract terms. Spot prices can fluctuate ±15% during peak demand seasons—typically ahead of the detergent production ramp-up for festivals in India and the Middle East. Decahydrate (Glauber’s salt) trades at a lower price per kg but contains only ~44% Na₂SO₄ by weight, making the effective cost per dry ton often higher when freight is factored in. Savvy procurement managers evaluate the delivered cost per metric ton of pure sodium sulphate, not just the headline per-kg price.
For buyers seeking competitive pricing, the dense network of chemical manufacturers in Gujarat acts as a bellwether. Because many sodium sulphide manufacturers in Gujarat also handle by-product sodium sulphate from sulfuric acid neutralization, they can offer aggressive pricing. This regional competition influences export prices for Chinese suppliers like Hailei Chemical, who benchmark against Indian and Egyptian prices to remain competitive globally. When requesting a quotation, provide annual or quarterly volume estimates to lock in favorable term contracts and hedge against market volatility.
A common query among curious buyers is: why sodium lauryl sulphate used in toothpaste? Sodium lauryl sulphate (SLS) is a surfactant that creates foam, helping to disperse toothpaste evenly and remove debris from teeth. It’s derived from coconut or palm kernel oil and sulfuric acid, neutralized with sodium carbonate or sodium hydroxide. While SLS provides the sensory foaming action consumers expect, it offers no cleaning efficacy by itself. In contrast, sodium sulphate does not generate foam but plays a supporting role in powdered personal care formulations—such as bath salts and foot soaks—where it acts as a diluent and texture modifier. More importantly, in the massive detergent powder industry, sodium sulphate is the unsung hero that bulks up the formulation, allowing manufacturers to use less expensive surfactants while maintaining powder flowability. Both chemicals, though phonetically similar, serve completely different industrial functions. For toothpaste buyers, SLS remains irreplaceable; for detergent and industrial buyers, sodium sulphate is the economical choice.
The chemical belt of Gujarat—stretching from Ankleshwar to Vapi—hosts some of the world’s most efficient sodium sulphide manufacturers in Gujarat. Their integrated operations offer valuable lessons for sodium sulphate buyers in terms of supply chain resilience, quality consistency, and cost management.
First, raw material synergy: manufacturers producing sodium sulphide (Na₂S) often require sodium sulphate as a precursor. This backward integration creates a captive demand for high-purity sodium sulphate, driving investments in refining capacity and quality control. As a result, by-product sodium sulphate streams from sulphide production are managed with strict purity standards, and surplus volumes enter the merchant market at competitive prices. For an international buyer, this means a secondary supply source that can be leveraged during global shortages.
Second, logistical advantages: Gujarat’s ports—Mundra, Kandla, and Hazira—facilitate efficient bulk export to Africa, the Middle East, and Southeast Asia. Containerized loading of sodium sulphate in 1-ton bags or bulk vessels is a routine operation, lowering freight costs. The co-existence of sodium sulphide and sodium sulphate manufacturing in the same region enables consolidation of shipments, reducing overall logistics expenses. A buyer ordering multiple chemicals from a single logistic partner in Gujarat can cut inland transportation and documentation costs significantly. This same model can be replicated when sourcing from Chinese exporters like Hailei Chemical, who consolidate various products (sodium sulphate, soda ash, etc.) in containers departing from Tianjin or Shanghai.
Third, quality benchmarks: the intense competition among sodium sulphide manufacturers in Gujarat has pushed quality parameters upward. For sodium sulphate, this translates into tighter tolerances for iron (≤20 ppm), chloride (≤0.1%), and water-insoluble matter (≤0.05%). Forward-thinking procurement managers use these Gujarat-origin specifications as a global benchmark when auditing other suppliers. Hailei Chemical’s sodium sulphate meets or exceeds these parameters, backed by in-house testing and SGS certificates per shipment.
Industrial anhydrous sodium sulphate should adhere to GB/T 6009-2014 (Chinese standard) or equivalent. The table below outlines typical specifications for 99% purity grade—ideal for detergent and glass applications.
Packaging matters as much as purity. Hailei Chemical offers moisture-resistant HDPE bags with inner PE liners, 25 kg or 50 kg, and 1,000–1,250 kg jumbo bags. For glass and pulp buyers who prefer bulk handling, 20-foot container shipments with 25-ton payload are standard. All packages are palletized and shrink-wrapped for ocean freight, with container desiccants to maintain dryness during transit of 4–6 weeks.
When evaluating suppliers—whether they are sodium sulphide manufacturers in Gujarat who also market sodium sulphate or dedicated Chinese exporters—request a retained sample and third-party assay (SGS, Bureau Veritas). Consistent quality on the first shipment builds trust; consistent quality over ten shipments builds a supply partnership.
The logistical efficiency of Gujarat’s chemical corridor offers a template for risk mitigation. Multiple container freight stations, abundant trucking fleets, and well-documented export procedures minimize lead times. For buyers in East Africa or the Arabian Gulf, transit times from Mundra can be as short as 7–10 days, making Gujarat a preferred source for sodium sulphate and other industrial chemicals. Buyers sourcing from competitors in China, however, benefit from deeper-water ports in Qingdao or Shanghai and competitive ocean freight rates on long-haul routes to South America or Europe. Hailei Chemical, with its location in Weifang (Shandong Province), leverages proximity to Qingdao port for efficient export, with typical lead times of 25–35 days to major ports worldwide. By studying the supply chain shortcuts used by sodium sulphide manufacturers in Gujarat, international buyers can better negotiate delivery terms, such as FOB versus CIF, and understand the hidden costs in demurrage and detention.
With decades of experience in fine chemical export, Hailei Chemical ensures that every shipment of sodium sulphate meets the exacting demands of detergent, glass, textile, and pulp industries. Our anhydrous sodium sulphate, with purity ≥99%, is produced under strict quality management systems and supported by comprehensive logistics services. We offer flexible packaging, competitive pricing tied to transparent market indices, and technical support to help you optimize your formulation. For procurement managers seeking an alternative to crowded supply routes or looking to diversify suppliers, Hailei Chemical provides reliability that rivals the best manufacturers globally.
Explore our product specification sheet or request a tailored quote for your sodium sulphate requirements today. Whether you need a single container trial or a long-term supply agreement, we are ready to deliver.
Visit our anhydrous sodium sulphate product page for in-depth technical data and packaging options. To discuss volumes, pricing, and shipping, request a quote now. Our team will respond within one business day with a competitive offer. Let Hailei Chemical be your reliable source for industrial sodium sulphate, backed by the supply chain insights of Gujarat’s chemical leaders.
Procurement managers and chemical engineers in the pulp and paper industry know that not all sodium sulfate for sale meets the strict specifications required for the kraft process. As a leading exporter from China, Weifang Hailei Fine Chemical Co., Ltd. provides high-purity anhydrous sodium sulfate (Na2SO4) that consistently delivers in this demanding application. Unlike generic commodity supplies, our 99% pure product is engineered to minimize iron carryover, reduce scaling in recovery boilers, and ensure a stable chemical balance in the pulping cycle. Whether you operate a kraft mill in Pakistan, a detergent plant in the Middle East, or a glass factory in Europe, understanding the chemical properties and supply chain dynamics can make the difference between smooth operations and costly downtime. In this article, we explore the pivotal role of sodium sulfate in kraft pulping, unpack the key quality parameters, and broaden the view to its use in detergents, glass, textiles, and even personal care products like shampoo.
The kraft (sulfate) process remains the dominant method for producing strong, high-quality paper from wood chips. Central to this process is the recovery of pulping chemicals—sodium hydroxide and sodium sulfide—from the spent black liquor. As the black liquor is combusted in the recovery boiler, the organic matter burns off, leaving a smelt of sodium carbonate and sodium sulfide. This smelt is dissolved to form green liquor, which is then causticized with lime to regenerate white liquor for cooking. During this intensive cycle, small but unavoidable losses of sodium and sulfur occur, primarily through residual chemicals in the washed pulp and through emissions.
Here is where sodium sulfate anhydrous enters as the critical makeup chemical. Added directly to the black liquor before it enters the recovery boiler, the sulfate ion is reduced to sulfide in the high-temperature, reducing atmosphere of the boiler char bed. This reaction replenishes both the sodium and sulfide inventory of the cooking liquor, maintaining the sulfidity level necessary for efficient delignification and fiber strength. Without a consistent, high-quality source of sodium sulfate, the entire chemical equilibrium of the mill is disrupted, leading to higher consumption of caustic soda, reduced pulp yield, and elevated operating costs.
Impurities in makeup sodium sulfate can have outsized consequences. Chlorides, for example, lower the melting point of the smelt and can accelerate corrosion of boiler tubes. Iron, even at trace levels, can catalyze cellulose degradation during the cook and end up in the final pulp, affecting brightness and bleaching chemical demand. This is why mills that truly optimize their chemical balance demand sodium sulfate with iron content below 20 ppm and chloride below 100 ppm—specifications that Hailei Fine Chemical exceeds with routine 99% purity material.
To appreciate its versatility, one must first understand the sodium sulfate chemical properties. Sodium sulfate (Na2SO4) exists mainly in two forms: the decahydrate (Glauber’s salt, Na2SO4·10H2O) and the anhydrous form. For industrial applications like kraft pulping, detergent manufacturing, and glass production, the anhydrous grade is preferred because of its higher sodium sulfate content, lower freight costs, and non-caking behavior.
| Property | Value (Anhydrous) |
|---|---|
| Molecular Formula | Na2SO4 |
| Molar Mass | 142.04 g/mol |
| Appearance | White crystalline powder |
| Density | 2.664 g/cm³ |
| Melting Point | 884 °C |
| Solubility in Water | Approx. 4.76 g/100 mL at 0 °C; 42.7 g/100 mL at 100 °C (unusual retrograde solubility above ~32 °C) |
| pH (5% solution) | 6–8 |
| Hygroscopic Nature | Low; resists caking in ambient conditions |
The retrograde solubility curve—where solubility decreases slightly with temperature above about 32 °C—is important in crystallizer design for sodium sulfate recovery. For the industrial buyer, the low hygroscopicity of the anhydrous form means it stays flowable in silos and big bags, a practical advantage in bulk handling.
Not every lot of sodium sulfate for sale is equal. Kraft mills, particularly those producing bleached grades for paper and board, require a tightly controlled feedstock. The following table reflects the typical specification sheet of Hailei’s high-purity anhydrous sodium sulfate, which surpasses the minimum requirements of most end-users.
| Parameter | Hailei Typical Value | Typical Industrial Requirement |
|---|---|---|
| Na₂SO₄ purity | ≥ 99.0% | ≥ 97.5% |
| Moisture | ≤ 0.3% | ≤ 0.5% |
| Water insolubles | ≤ 0.05% | ≤ 0.10% |
| Iron (Fe) | ≤ 10 ppm | ≤ 20 ppm |
| Chloride (Cl) | ≤ 50 ppm | ≤ 100 ppm |
| Calcium + Magnesium | ≤ 200 ppm | ≤ 400 ppm |
| pH (5% aq. soln.) | 6.5–7.5 | 6.0–8.0 |
Procurement tip: Always request the certificate of analysis (COA) and ensure the supplier uses washing and drying processes that minimize residual mother liquor—the main source of chlorides. Our anhydrous sodium sulfate is produced via a robust evaporation and crystallization route, resulting in a product that not only meets but often significantly undercuts these impurity limits.
In the production of synthetic laundry detergents, sodium sulfate serves as an inert filler that allows formulators to standardize active surfactant concentration. Because it is compatible with anionic surfactants and does not affect the detergent’s alkalinity profile, it is used at levels up to 40% by weight in some powder formulations. The anhydrous grade helps prevent caking in detergent packs and aids in achieving a uniform particle size distribution. Here again, low iron content is vital to avoid staining of fabrics.
In the glass industry, sodium sulfate acts as a fining agent, added to the batch to help release small gas bubbles during the melt. It also functions as an oxidizer to maintain the redox balance in amber and flint glass. However, glassmakers must be aware that sodium sulfate is not a source of nickel sulfide inclusions. Nickel sulphide in glass—a critical concern for tempered glass—originates from nickel-bearing contaminants in cullet or raw materials, not from the sulfate batch component. When sourcing sodium sulfate for glass, the key parameter is consistent particle size to avoid segregation in the batch house, along with low levels of heavy metals that could discolor the melt.
Textile mills employ sodium sulfate as a leveling agent in direct, sulfur, and reactive dyeing. By moderating the rate of dye exhaustion, it ensures even color uptake on cellulosic fibers like cotton and rayon. A consistent, fine crystalline structure—like Hailei’s product—dissolves quickly in dye baths, reducing processing time and preventing particulate deposits on fabric. The near-neutral pH protects sensitive dyes and fabrics from hydrolytic attack.
Sodium sulfate is a precursor for the production of sodium sulfide, sodium silicate, and ultramarine pigments. In these downstream syntheses, high purity reduces unwanted side reactions and increases the yield of the target compound. Our customers in the chemical sector value the batch-to-batch consistency that Hailei delivers, supported by rigorous process control and third-party laboratory testing.
You may be surprised to find an industrial chemical in your bathroom, but what is sodium sulfate in shampoo? In cosmetic formulations, sodium sulfate—often as part of a blend in shampoos, body washes, and toothpaste—primarily functions as a viscosity builder. It helps thicken the product by promoting the arrangement of surfactant micelles, giving the desired pour behavior and sensory feel. It is chemically inert, non-toxic, and approved by regulatory bodies for use in rinse-off products. While the cosmetic grade requires ultra-high purity and often undergoes additional purification, the fundamental sodium sulfate molecule is identical to the industrial grade. Hailei does not supply the cosmetic market directly, but many of our buyers in the detergent and surfactant manufacturing sectors use anhydrous sodium sulfate as a precursor to producing sodium lauryl sulfate (SLS) and sodium lauryl ether sulfate (SLES)—the true cleansing workhorses in shampoos.
For buyers in South Asia, the sodium sulphate price in Pakistan is influenced by a combination of regional dynamics and global benchmarks. Pakistan is a significant importer of this commodity, relying on Chinese and Indian supply. Key pricing factors include:
While we do not publish spot prices due to market volatility, Hailei Fine Chemical is known for offering some of the most competitive FOB/CIF quotations to Pakistani buyers. We ship 1,000–25,000 kg lots in 25 kg or 1,000 kg PP/PE bags, and we can arrange containerized or break-bulk deliveries. For an up-to-date custom quotation, simply provide your required spec, monthly tonnage, and preferred port of discharge.
With over two decades of production and export experience, Weifang Hailei Fine Chemical Co., Ltd. has established itself as a trusted partner for industrial chemical procurement. Here is what sets us apart when you search for sodium sulfate for sale:
Store anhydrous sodium sulfate in a cool, dry, well-ventilated area away from moisture. Although it is not highly hygroscopic, prolonged exposure to high humidity can cause surface caking. Keep containers sealed when not in use.
Sodium sulfate is not classified as dangerous under GHS or major transport regulations. It can cause mild eye or respiratory irritation as a fine dust, so use appropriate dust control and personal protective equipment (PPE).
We typically accept orders starting from one 20-foot container (20–28 metric tons), but we can accommodate smaller trial orders. Contact our sales team for options.
If stored properly, anhydrous sodium sulfate has an indefinite shelf life. It does not decompose or degrade under normal storage conditions.
Whether your operation is a kraft paper mill tightening its chemical recovery efficiency, a detergent formulator needing reliable filler, or a glass manufacturer optimizing melt quality, the right sodium sulfate source makes all the difference. At Hailei Fine Chemical, we don’t just offer sodium sulfate for sale—we deliver a partnership in quality, consistency, and industrial expertise.
Explore the full specifications, request the latest COA, and discuss your supply needs by visiting our Sodium Sulphate product page. For a personalized quote tailored to your volume and shipping requirements, get a quote today and let our team demonstrate why leading buyers trust Hailei as their chemical backbone.
Procurement managers and chemical engineers in the pulp and paper industry know that not all sodium sulfate for sale meets the strict specifications required for the kraft process. As a leading exporter from China, Weifang Hailei Fine Chemical Co., Ltd. provides high-purity anhydrous sodium sulfate (Na2SO4) that consistently delivers in this demanding application. Unlike generic commodity supplies, our 99% pure product is engineered to minimize iron carryover, reduce scaling in recovery boilers, and ensure a stable chemical balance in the pulping cycle. Whether you operate a kraft mill in Pakistan, a detergent plant in the Middle East, or a glass factory in Europe, understanding the chemical properties and supply chain dynamics can make the difference between smooth operations and costly downtime. In this article, we explore the pivotal role of sodium sulfate in kraft pulping, unpack the key quality parameters, and broaden the view to its use in detergents, glass, textiles, and even personal care products like shampoo.
The kraft (sulfate) process remains the dominant method for producing strong, high-quality paper from wood chips. Central to this process is the recovery of pulping chemicals—sodium hydroxide and sodium sulfide—from the spent black liquor. As the black liquor is combusted in the recovery boiler, the organic matter burns off, leaving a smelt of sodium carbonate and sodium sulfide. This smelt is dissolved to form green liquor, which is then causticized with lime to regenerate white liquor for cooking. During this intensive cycle, small but unavoidable losses of sodium and sulfur occur, primarily through residual chemicals in the washed pulp and through emissions.
Here is where sodium sulfate anhydrous enters as the critical makeup chemical. Added directly to the black liquor before it enters the recovery boiler, the sulfate ion is reduced to sulfide in the high-temperature, reducing atmosphere of the boiler char bed. This reaction replenishes both the sodium and sulfide inventory of the cooking liquor, maintaining the sulfidity level necessary for efficient delignification and fiber strength. Without a consistent, high-quality source of sodium sulfate, the entire chemical equilibrium of the mill is disrupted, leading to higher consumption of caustic soda, reduced pulp yield, and elevated operating costs.
Impurities in makeup sodium sulfate can have outsized consequences. Chlorides, for example, lower the melting point of the smelt and can accelerate corrosion of boiler tubes. Iron, even at trace levels, can catalyze cellulose degradation during the cook and end up in the final pulp, affecting brightness and bleaching chemical demand. This is why mills that truly optimize their chemical balance demand sodium sulfate with iron content below 20 ppm and chloride below 100 ppm—specifications that Hailei Fine Chemical exceeds with routine 99% purity material.
To appreciate its versatility, one must first understand the sodium sulfate chemical properties. Sodium sulfate (Na2SO4) exists mainly in two forms: the decahydrate (Glauber’s salt, Na2SO4·10H2O) and the anhydrous form. For industrial applications like kraft pulping, detergent manufacturing, and glass production, the anhydrous grade is preferred because of its higher sodium sulfate content, lower freight costs, and non-caking behavior.
| Property | Value (Anhydrous) |
|---|---|
| Molecular Formula | Na2SO4 |
| Molar Mass | 142.04 g/mol |
| Appearance | White crystalline powder |
| Density | 2.664 g/cm³ |
| Melting Point | 884 °C |
| Solubility in Water | Approx. 4.76 g/100 mL at 0 °C; 42.7 g/100 mL at 100 °C (unusual retrograde solubility above ~32 °C) |
| pH (5% solution) | 6–8 |
| Hygroscopic Nature | Low; resists caking in ambient conditions |
The retrograde solubility curve—where solubility decreases slightly with temperature above about 32 °C—is important in crystallizer design for sodium sulfate recovery. For the industrial buyer, the low hygroscopicity of the anhydrous form means it stays flowable in silos and big bags, a practical advantage in bulk handling.
Not every lot of sodium sulfate for sale is equal. Kraft mills, particularly those producing bleached grades for paper and board, require a tightly controlled feedstock. The following table reflects the typical specification sheet of Hailei’s high-purity anhydrous sodium sulfate, which surpasses the minimum requirements of most end-users.
| Parameter | Hailei Typical Value | Typical Industrial Requirement |
|---|---|---|
| Na₂SO₄ purity | ≥ 99.0% | ≥ 97.5% |
| Moisture | ≤ 0.3% | ≤ 0.5% |
| Water insolubles | ≤ 0.05% | ≤ 0.10% |
| Iron (Fe) | ≤ 10 ppm | ≤ 20 ppm |
| Chloride (Cl) | ≤ 50 ppm | ≤ 100 ppm |
| Calcium + Magnesium | ≤ 200 ppm | ≤ 400 ppm |
| pH (5% aq. soln.) | 6.5–7.5 | 6.0–8.0 |
Procurement tip: Always request the certificate of analysis (COA) and ensure the supplier uses washing and drying processes that minimize residual mother liquor—the main source of chlorides. Our anhydrous sodium sulfate is produced via a robust evaporation and crystallization route, resulting in a product that not only meets but often significantly undercuts these impurity limits.
In the production of synthetic laundry detergents, sodium sulfate serves as an inert filler that allows formulators to standardize active surfactant concentration. Because it is compatible with anionic surfactants and does not affect the detergent’s alkalinity profile, it is used at levels up to 40% by weight in some powder formulations. The anhydrous grade helps prevent caking in detergent packs and aids in achieving a uniform particle size distribution. Here again, low iron content is vital to avoid staining of fabrics.
In the glass industry, sodium sulfate acts as a fining agent, added to the batch to help release small gas bubbles during the melt. It also functions as an oxidizer to maintain the redox balance in amber and flint glass. However, glassmakers must be aware that sodium sulfate is not a source of nickel sulfide inclusions. Nickel sulphide in glass—a critical concern for tempered glass—originates from nickel-bearing contaminants in cullet or raw materials, not from the sulfate batch component. When sourcing sodium sulfate for glass, the key parameter is consistent particle size to avoid segregation in the batch house, along with low levels of heavy metals that could discolor the melt.
Textile mills employ sodium sulfate as a leveling agent in direct, sulfur, and reactive dyeing. By moderating the rate of dye exhaustion, it ensures even color uptake on cellulosic fibers like cotton and rayon. A consistent, fine crystalline structure—like Hailei’s product—dissolves quickly in dye baths, reducing processing time and preventing particulate deposits on fabric. The near-neutral pH protects sensitive dyes and fabrics from hydrolytic attack.
Sodium sulfate is a precursor for the production of sodium sulfide, sodium silicate, and ultramarine pigments. In these downstream syntheses, high purity reduces unwanted side reactions and increases the yield of the target compound. Our customers in the chemical sector value the batch-to-batch consistency that Hailei delivers, supported by rigorous process control and third-party laboratory testing.
You may be surprised to find an industrial chemical in your bathroom, but what is sodium sulfate in shampoo? In cosmetic formulations, sodium sulfate—often as part of a blend in shampoos, body washes, and toothpaste—primarily functions as a viscosity builder. It helps thicken the product by promoting the arrangement of surfactant micelles, giving the desired pour behavior and sensory feel. It is chemically inert, non-toxic, and approved by regulatory bodies for use in rinse-off products. While the cosmetic grade requires ultra-high purity and often undergoes additional purification, the fundamental sodium sulfate molecule is identical to the industrial grade. Hailei does not supply the cosmetic market directly, but many of our buyers in the detergent and surfactant manufacturing sectors use anhydrous sodium sulfate as a precursor to producing sodium lauryl sulfate (SLS) and sodium lauryl ether sulfate (SLES)—the true cleansing workhorses in shampoos.
For buyers in South Asia, the sodium sulphate price in Pakistan is influenced by a combination of regional dynamics and global benchmarks. Pakistan is a significant importer of this commodity, relying on Chinese and Indian supply. Key pricing factors include:
While we do not publish spot prices due to market volatility, Hailei Fine Chemical is known for offering some of the most competitive FOB/CIF quotations to Pakistani buyers. We ship 1,000–25,000 kg lots in 25 kg or 1,000 kg PP/PE bags, and we can arrange containerized or break-bulk deliveries. For an up-to-date custom quotation, simply provide your required spec, monthly tonnage, and preferred port of discharge.
With over two decades of production and export experience, Weifang Hailei Fine Chemical Co., Ltd. has established itself as a trusted partner for industrial chemical procurement. Here is what sets us apart when you search for sodium sulfate for sale:
Store anhydrous sodium sulfate in a cool, dry, well-ventilated area away from moisture. Although it is not highly hygroscopic, prolonged exposure to high humidity can cause surface caking. Keep containers sealed when not in use.
Sodium sulfate is not classified as dangerous under GHS or major transport regulations. It can cause mild eye or respiratory irritation as a fine dust, so use appropriate dust control and personal protective equipment (PPE).
We typically accept orders starting from one 20-foot container (20–28 metric tons), but we can accommodate smaller trial orders. Contact our sales team for options.
If stored properly, anhydrous sodium sulfate has an indefinite shelf life. It does not decompose or degrade under normal storage conditions.
Whether your operation is a kraft paper mill tightening its chemical recovery efficiency, a detergent formulator needing reliable filler, or a glass manufacturer optimizing melt quality, the right sodium sulfate source makes all the difference. At Hailei Fine Chemical, we don’t just offer sodium sulfate for sale—we deliver a partnership in quality, consistency, and industrial expertise.
Explore the full specifications, request the latest COA, and discuss your supply needs by visiting our Sodium Sulphate product page. For a personalized quote tailored to your volume and shipping requirements, get a quote today and let our team demonstrate why leading buyers trust Hailei as their chemical backbone.
Procurement managers and chemical engineers in the pulp and paper industry know that not all sodium sulfate for sale meets the strict specifications required for the kraft process. As a leading exporter from China, Weifang Hailei Fine Chemical Co., Ltd. provides high-purity anhydrous sodium sulfate (Na2SO4) that consistently delivers in this demanding application. Unlike generic commodity supplies, our 99% pure product is engineered to minimize iron carryover, reduce scaling in recovery boilers, and ensure a stable chemical balance in the pulping cycle. Whether you operate a kraft mill in Pakistan, a detergent plant in the Middle East, or a glass factory in Europe, understanding the chemical properties and supply chain dynamics can make the difference between smooth operations and costly downtime. In this article, we explore the pivotal role of sodium sulfate in kraft pulping, unpack the key quality parameters, and broaden the view to its use in detergents, glass, textiles, and even personal care products like shampoo.
The kraft (sulfate) process remains the dominant method for producing strong, high-quality paper from wood chips. Central to this process is the recovery of pulping chemicals—sodium hydroxide and sodium sulfide—from the spent black liquor. As the black liquor is combusted in the recovery boiler, the organic matter burns off, leaving a smelt of sodium carbonate and sodium sulfide. This smelt is dissolved to form green liquor, which is then causticized with lime to regenerate white liquor for cooking. During this intensive cycle, small but unavoidable losses of sodium and sulfur occur, primarily through residual chemicals in the washed pulp and through emissions.
Here is where sodium sulfate anhydrous enters as the critical makeup chemical. Added directly to the black liquor before it enters the recovery boiler, the sulfate ion is reduced to sulfide in the high-temperature, reducing atmosphere of the boiler char bed. This reaction replenishes both the sodium and sulfide inventory of the cooking liquor, maintaining the sulfidity level necessary for efficient delignification and fiber strength. Without a consistent, high-quality source of sodium sulfate, the entire chemical equilibrium of the mill is disrupted, leading to higher consumption of caustic soda, reduced pulp yield, and elevated operating costs.
Impurities in makeup sodium sulfate can have outsized consequences. Chlorides, for example, lower the melting point of the smelt and can accelerate corrosion of boiler tubes. Iron, even at trace levels, can catalyze cellulose degradation during the cook and end up in the final pulp, affecting brightness and bleaching chemical demand. This is why mills that truly optimize their chemical balance demand sodium sulfate with iron content below 20 ppm and chloride below 100 ppm—specifications that Hailei Fine Chemical exceeds with routine 99% purity material.
To appreciate its versatility, one must first understand the sodium sulfate chemical properties. Sodium sulfate (Na2SO4) exists mainly in two forms: the decahydrate (Glauber’s salt, Na2SO4·10H2O) and the anhydrous form. For industrial applications like kraft pulping, detergent manufacturing, and glass production, the anhydrous grade is preferred because of its higher sodium sulfate content, lower freight costs, and non-caking behavior.
| Property | Value (Anhydrous) |
|---|---|
| Molecular Formula | Na2SO4 |
| Molar Mass | 142.04 g/mol |
| Appearance | White crystalline powder |
| Density | 2.664 g/cm³ |
| Melting Point | 884 °C |
| Solubility in Water | Approx. 4.76 g/100 mL at 0 °C; 42.7 g/100 mL at 100 °C (unusual retrograde solubility above ~32 °C) |
| pH (5% solution) | 6–8 |
| Hygroscopic Nature | Low; resists caking in ambient conditions |
The retrograde solubility curve—where solubility decreases slightly with temperature above about 32 °C—is important in crystallizer design for sodium sulfate recovery. For the industrial buyer, the low hygroscopicity of the anhydrous form means it stays flowable in silos and big bags, a practical advantage in bulk handling.
Not every lot of sodium sulfate for sale is equal. Kraft mills, particularly those producing bleached grades for paper and board, require a tightly controlled feedstock. The following table reflects the typical specification sheet of Hailei’s high-purity anhydrous sodium sulfate, which surpasses the minimum requirements of most end-users.
| Parameter | Hailei Typical Value | Typical Industrial Requirement |
|---|---|---|
| Na₂SO₄ purity | ≥ 99.0% | ≥ 97.5% |
| Moisture | ≤ 0.3% | ≤ 0.5% |
| Water insolubles | ≤ 0.05% | ≤ 0.10% |
| Iron (Fe) | ≤ 10 ppm | ≤ 20 ppm |
| Chloride (Cl) | ≤ 50 ppm | ≤ 100 ppm |
| Calcium + Magnesium | ≤ 200 ppm | ≤ 400 ppm |
| pH (5% aq. soln.) | 6.5–7.5 | 6.0–8.0 |
Procurement tip: Always request the certificate of analysis (COA) and ensure the supplier uses washing and drying processes that minimize residual mother liquor—the main source of chlorides. Our anhydrous sodium sulfate is produced via a robust evaporation and crystallization route, resulting in a product that not only meets but often significantly undercuts these impurity limits.
In the production of synthetic laundry detergents, sodium sulfate serves as an inert filler that allows formulators to standardize active surfactant concentration. Because it is compatible with anionic surfactants and does not affect the detergent’s alkalinity profile, it is used at levels up to 40% by weight in some powder formulations. The anhydrous grade helps prevent caking in detergent packs and aids in achieving a uniform particle size distribution. Here again, low iron content is vital to avoid staining of fabrics.
In the glass industry, sodium sulfate acts as a fining agent, added to the batch to help release small gas bubbles during the melt. It also functions as an oxidizer to maintain the redox balance in amber and flint glass. However, glassmakers must be aware that sodium sulfate is not a source of nickel sulfide inclusions. Nickel sulphide in glass—a critical concern for tempered glass—originates from nickel-bearing contaminants in cullet or raw materials, not from the sulfate batch component. When sourcing sodium sulfate for glass, the key parameter is consistent particle size to avoid segregation in the batch house, along with low levels of heavy metals that could discolor the melt.
Textile mills employ sodium sulfate as a leveling agent in direct, sulfur, and reactive dyeing. By moderating the rate of dye exhaustion, it ensures even color uptake on cellulosic fibers like cotton and rayon. A consistent, fine crystalline structure—like Hailei’s product—dissolves quickly in dye baths, reducing processing time and preventing particulate deposits on fabric. The near-neutral pH protects sensitive dyes and fabrics from hydrolytic attack.
Sodium sulfate is a precursor for the production of sodium sulfide, sodium silicate, and ultramarine pigments. In these downstream syntheses, high purity reduces unwanted side reactions and increases the yield of the target compound. Our customers in the chemical sector value the batch-to-batch consistency that Hailei delivers, supported by rigorous process control and third-party laboratory testing.
You may be surprised to find an industrial chemical in your bathroom, but what is sodium sulfate in shampoo? In cosmetic formulations, sodium sulfate—often as part of a blend in shampoos, body washes, and toothpaste—primarily functions as a viscosity builder. It helps thicken the product by promoting the arrangement of surfactant micelles, giving the desired pour behavior and sensory feel. It is chemically inert, non-toxic, and approved by regulatory bodies for use in rinse-off products. While the cosmetic grade requires ultra-high purity and often undergoes additional purification, the fundamental sodium sulfate molecule is identical to the industrial grade. Hailei does not supply the cosmetic market directly, but many of our buyers in the detergent and surfactant manufacturing sectors use anhydrous sodium sulfate as a precursor to producing sodium lauryl sulfate (SLS) and sodium lauryl ether sulfate (SLES)—the true cleansing workhorses in shampoos.
For buyers in South Asia, the sodium sulphate price in Pakistan is influenced by a combination of regional dynamics and global benchmarks. Pakistan is a significant importer of this commodity, relying on Chinese and Indian supply. Key pricing factors include:
While we do not publish spot prices due to market volatility, Hailei Fine Chemical is known for offering some of the most competitive FOB/CIF quotations to Pakistani buyers. We ship 1,000–25,000 kg lots in 25 kg or 1,000 kg PP/PE bags, and we can arrange containerized or break-bulk deliveries. For an up-to-date custom quotation, simply provide your required spec, monthly tonnage, and preferred port of discharge.
With over two decades of production and export experience, Weifang Hailei Fine Chemical Co., Ltd. has established itself as a trusted partner for industrial chemical procurement. Here is what sets us apart when you search for sodium sulfate for sale:
Store anhydrous sodium sulfate in a cool, dry, well-ventilated area away from moisture. Although it is not highly hygroscopic, prolonged exposure to high humidity can cause surface caking. Keep containers sealed when not in use.
Sodium sulfate is not classified as dangerous under GHS or major transport regulations. It can cause mild eye or respiratory irritation as a fine dust, so use appropriate dust control and personal protective equipment (PPE).
We typically accept orders starting from one 20-foot container (20–28 metric tons), but we can accommodate smaller trial orders. Contact our sales team for options.
If stored properly, anhydrous sodium sulfate has an indefinite shelf life. It does not decompose or degrade under normal storage conditions.
Whether your operation is a kraft paper mill tightening its chemical recovery efficiency, a detergent formulator needing reliable filler, or a glass manufacturer optimizing melt quality, the right sodium sulfate source makes all the difference. At Hailei Fine Chemical, we don’t just offer sodium sulfate for sale—we deliver a partnership in quality, consistency, and industrial expertise.
Explore the full specifications, request the latest COA, and discuss your supply needs by visiting our Sodium Sulphate product page. For a personalized quote tailored to your volume and shipping requirements, get a quote today and let our team demonstrate why leading buyers trust Hailei as their chemical backbone.
For detergent manufacturers seeking consistent bulk density, improved flowability, and cost-effective formulations, understanding the uses of sodium sulphate in soap making is essential. Sodium sulphate anhydrous (Na₂SO₄) serves as the primary inert filler in powdered laundry detergents and synthetic soap bars, typically comprising 20–45% of the final product by weight. As a procurement professional or formulation chemist, you need precise specifications, reliable sourcing, and performance data to maintain product quality while controlling raw material costs. This comprehensive guide examines why sodium sulphate remains irreplaceable in soap manufacturing, how its chemical nature as a neutral salt influences detergent alkalinity, and what factors to consider when selecting a supplier like Weifang Hailei Fine Chemical Co., Ltd..
The core function of sodium sulphate in soap making is to act as a diluent, adjusting the active ingredient concentration to target wash performance while allowing economical mass production. Unlike water-soluble fillers such as sodium chloride, sodium sulphate anhydrous offers superior free-flow characteristics, anti-caking properties, and excellent compatibility with anionic surfactants like linear alkylbenzene sulphonate (LAS) and sodium lauryl sulphate.
In high-pressure spray-drying towers, the filler must withstand temperatures of 250–400°C without decomposing or releasing moisture. Anhydrous sodium sulphate meets this demand with a melting point of 884°C and hygroscopicity significantly lower than common alternatives. The resulting hollow detergent beads exhibit uniform size distribution, controlled bulk density (typically 0.35–0.55 g/cm³), and minimal dusting during pouch filling—all parameters directly influenced by sodium sulphate grade and particle size.
From a cost perspective, sodium sulphate prices have remained relatively stable in Asian markets. While enquiries like “sodium sulphate price in India” reflect regional demand, global contracts often reference FOB Qingdao or CIF Nhava Sheva. As of 2025, competitive ex-works rates for 99% purity anhydrous grade hover around $85–$110/MT, depending on packaging and volume. Hailei Chemical’s direct manufacturing capability in Shandong Province grants detergent producers a cost advantage without intermediary mark-ups.
A recurring technical query among soap makers is: “sodium sulphate is basic or neutral?” The straightforward answer is that sodium sulphate is a neutral salt—formed from the reaction of a strong acid (sulphuric acid) and a strong base (sodium hydroxide)—and yields a pH of 5.5–7.0 in a 5% aqueous solution. It does not contribute alkalinity to detergent powders. However, its presence can moderate the harshness of active alkaline builders like sodium carbonate (soda ash) or sodium metasilicate by physical dilution, effectively buffering the overall pH of the wash liquor to around 9.5–10.5, which is optimal for cleaning efficiency and skin tolerance.
This neutrality is critical because label claims for ‘pH balanced’ or ‘mild on hands’ in household detergent bars often rely on the filler’s inert character. In industrial soap making (large-scale laundry powders), formulators deliberately combine sodium sulphate with alkaline activators to achieve a controlled reserve alkalinity. The fact that sodium sulphate is basic in a literal sense is false—it is neither acidic nor alkaline—but its role in pH balancing makes it indispensable. Quality specifications should include a pH value (1% solution) between 6.0 and 8.0, as per GB/T 6009-2014 industry standards, guaranteeing no unintended alkalinity.
Purchasing decisions for sodium sulphate in detergent manufacturing hinge on several parameters that directly impact production yield, powder integrity, and final product performance. The table below summarises the benchmarks for anhydrous sodium sulphate (Hailei Chemical’s 99% purity grade) versus standard industrial requirements.
Beyond numerical specs, the crystalline form (anhydrous vs. Glauber’s salt) must suit the production line. Spray-drying plants rely exclusively on anhydrous sodium sulphate because decahydrate (Na₂SO₄·10H₂O) would release water upon heating, collapsing the bead structure and drastically increasing energy costs. Hailei Chemical’s product is produced via controlled calcination of natural mirabilite, delivering consistent anhydrous form with minimal free-flow modifiers.
For synthetic laundry bars (also called washing cakes) popular in South Asia, Africa, and Latin America, sodium sulphate plays a dual role. In soap making using saponified fatty acids, sodium sulphate acts as a crystal modifier during solidification. By incorporating 15–20% sodium sulphate in the formulation, manufacturers increase the bar’s rigidity, reduce wear rate during use, and lower the raw material bill without compromising cleaning efficacy.
During plodding and extrusion, the filler aids in controlling plasticity. The fine anhydrous particles bind residual moisture, enabling the bar to maintain shape under humid storage conditions. Moreover, its dissolution rate in cold water is moderate—around 190 g/L at 20°C—meaning the filler does not leach out instantly but provides gradual volume replacement as the surfactant slowly dissolves. This sustained-release effect is particularly valued in bucket-washing scenarios typical of emerging markets.
From a procurement standpoint, bar soap makers should specify a slightly coarser grade (80-mesh pass) to minimise dust generation in milling while still achieving even distribution. The price delta for such tailoring is negligible when buying container loads directly from a single manufacturer like Hailei Chemical, which can customise mesh sizes upon request.
Sourcing specialists frequently search for “sodium sulphate price in India” because that nation is the world’s largest detergent grade consumer. Prices in the Indian domestic market oscillate based on monsoons (affecting inland mirabilite production) and import parity from Chinese exporters. As a reference, CFR Mumbai for 99% min, 50 kg bags currently ranges $105–$125/MT. Coastal detergent clusters in Gujarat and Maharashtra increasingly look toward direct import from Shandong to secure 5–8% cost savings over traditional inland suppliers.
Price volatility can be hedged through annual contracts with price adjustment clauses linked to Shanghai Futures Exchange sulphuric acid indices, since sodium sulphate manufacturing consumes sulphur compounds. Hailei Chemical offers transparent quarterly pricing with volume discounts starting at 100 MT/month, helping soap makers stabilise their bill of materials.
Although this article focuses on the uses of sodium sulphate in soap making, detergents and glass manufacturing share common chemical supply chains, prompting enquiries about complementary raw materials. One such query is “nickel sulphide in glass” — a defect causing spontaneous glass breakage. While nickel sulphide is unrelated to detergent production, sodium sulphate’s role as a glass fining agent is notable: in float glass manufacturing, sodium sulphate (5–8 kg per tonne of silica) scours the melt by generating sulphur dioxide to remove bubbles. The same raw material procured for soap making must be free of nickel compounds because even trace nickel could catalyse undesirable colouration if the sodium sulphate were later sold into the glass sector. Responsible suppliers maintain strict segregation of product streams.
Similarly, the term “sulfuric acid and glass” often appears in industrial forums. Sulphuric acid etches glass but does not attack sodium sulphate; however, sodium sulphate can be converted to sodium bisulphate under acidic conditions in detergent slurry preparation—a side reaction that can reduce filler efficiency. Therefore, formulation chemists must precisely control slurry pH above 8 before adding sodium sulphate to prevent acidification by hydrolysed LAS. This nuance reinforces the importance of quality technical support from your sodium sulphate supplier.
Transporting sodium sulphate anhydrous for soap making entails handling a fine, mildly hygroscopic powder. Optimal packaging includes 25 kg/50 kg woven polypropylene (PP) bags with inner polyethylene liner, palletized and shrink-wrapped for container shipment. For bulk soap operations consuming upwards of 500 MT monthly, flexible intermediate bulk containers (FIBCs) of 1000–1250 kg loading are standard. These big bags require moisture-resistant coating and must be loaded under covered conditions to prevent caking.
Sea freight from Qingdao to key detergent hubs like Tema, Chittagong, or Santos typically takes 25–40 days. During monsoon seasons, requesting a quote with CIF terms including marine insurance is advisable. Hailei Chemical’s logistics team coordinates with major carriers to secure competitive freight rates and offers fumigation-free wooden pallets meeting ISPM 15 standards, streamlining customs clearance.
Detergent raw materials fall under varying regulatory frameworks. In the EU, sodium sulphate as a filler in household detergents is exempt from mandatory registration under CLP, but must still satisfy the Detergent Regulation (EC) No 648/2004 for biodegradability of complete formulations. In the US, it appears on the TSCA inventory as a safe substance. Indian standards (IS 254:2000) require sodium sulphate for detergent use to be free from sulphide and heavy metal contaminants.
Hailei Chemical provides a Certificate of Analysis (CoA) per batch, including:
Third-party inspection by SGS or Bureau Veritas can be arranged, allowing buyers to confirm quality before shipment. This evidence-based approach strengthens your own supply chain assurance and aligns with Google’s EEAT principles for trustworthy sourcing.
Beyond supplier specifications, how you handle and incorporate sodium sulphate within your factory determines whether the filler performs as intended. Here are actionable recommendations:
Weifang Hailei Fine Chemical Co., Ltd. operates a dedicated production line for anhydrous sodium sulphate with an annual capacity exceeding 50,000 MT. Located in the rich mirabilite resource zone of Shandong, we leverage natural brine purification and high-temperature calcination technology to deliver >99% purity consistently. Our product has been qualified by multinational detergent conglomerates and smaller independent millers alike.
Clients choose Hailei because we offer:
If you are reformulating your detergent powder to reduce cost, launching a new synthetic soap bar, or simply seeking a more reliable supply chain, we invite you to discuss your requirements with our technical sales team. Request a quote today and receive a sample analysis along with our best CIF offer tailored to your destination port.
Keywords: uses of sodium sulphate in soap making, sodium sulphate is basic, sodium sulphate price in india
For detergent manufacturers, glass producers, and textile mills, anhydrous sodium sulphate (Na2SO4) is a high-volume raw material where even a small price difference per metric ton quickly translates into significant annual cost variance. Monitoring the sodium sulphate wholesale price is not just about finding the lowest quote—it’s about balancing purity, logistics, supply security, and technical performance. As a leading exporter of industrial chemicals since 2008, Weifang Hailei Fine Chemical Co., Ltd. supplies high-purity sodium sulphate to buyers across 60+ countries. This guide breaks down the key factors that shape market prices, how to evaluate quotations, and actionable strategies to secure the best value for your procurement needs.
Anhydrous sodium sulphate (Na2SO4, CAS 7757-82-6) is an inorganic salt appearing as a white crystalline powder. With a molecular weight of 142.04 g/mol, it dissolves readily in water with a cooling effect and exhibits a neutral pH of sodium sulphate solutions—typically 6.0–8.0 in a 5% aqueous mixture at 25°C. This chemical inertness, combined with low toxicity and favorable cost per kilogram, makes it indispensable across several heavy industries.
Key consumption segments driving the sodium sulphate wholesale price include:
Because the largest end-users tend to buy in full container loads or bulk shipments, the sodium sulphate price they negotiate depends heavily on order volume and long-term contracts. A clear understanding of the cost components helps you benchmark your supplier’s quotation against market realities.
The manufacture of sodium sulphate falls into two categories, each with distinct cost profiles:
Hailei Chemical sources both natural and synthetic options, allowing us to offer a competitive sodium sulphate wholesale price across different specification brackets. Our standard export grade maintains 99% min purity with extremely low chloride and iron content. For more details, visit our sodium sulphate anhydrous product page.
China, as the world’s largest producer, sees sodium sulphate prices heavily influenced by coal and natural gas costs (for dehydration/evaporation), sulfuric acid prices (for synthetic routes), and logistics constraints. When energy policies tighten or peak-shaving electricity rates rise, production costs climb, and the sodium sulphate wholesale price tends to follow. Monitoring thermal coal indexes and ocean freight rates from Tianjin/Qingdao ports gives you early signals of upcoming price movements.
Not all sodium sulphate is created equal. The sodium sulphate price you see on an FOB quotation reflects the exact specification sheet. Typical differences include:
| Parameter | Standard Industrial Grade | Premium Grade (Hailei Chemical) |
|---|---|---|
| Na2SO4 purity | ≥ 98% | ≥ 99% |
| Whiteness | 80–85 | ≥ 88 |
| pH (5% solution) | 6.0–8.5 | 6.0–8.0 |
| Moisture | ≤ 0.5% | ≤ 0.2% |
| Chloride (Cl) | ≤ 0.35% | ≤ 0.10% |
| Iron (Fe) | ≤ 0.02% | ≤ 0.005% |
A premium purity grade with tight moisture and chloride control costs more to produce but prevents quality defects in sensitive applications like optical glass or white detergent powders. The ph of sodium sulphate solution must also remain stable within the neutral range to avoid dye hydrolysis in textile processes. Always request a Certificate of Analysis (CoA) matched to your order lot.
Packaging is a silent price driver. Standard export options include 25 kg PP/PE bags, 50 kg bags, 1000 kg FIBC supersacks, or bulk in 20’/40’ containers. The sodium sulphate wholesale price (FOB or CFR) will adjust by $10–$25 per metric ton depending on bagging fees, palletization, and container stuffing. Sea freight from Qingdao to main ports in the Middle East, Africa, or South Asia further layers into CFR/CIF quotations. Buyers who can take full 20’ FCL (27 metric tons) rather than LCL enjoy significant per-ton savings.
India is both a major producer and consumer of sodium sulphate. Interestingly, the state of Gujarat hosts numerous sodium sulphide manufacturers in Gujarat who rely on sodium sulphate as a key raw material for the barium reduction or carbon reduction processes. When demand for sodium sulphide surges—driven by leather tanning, metal ore flotation, or water treatment chemicals—local consumption of sodium sulphate increases, tightening supply and potentially lifting regional spot prices. This effect ripples back to global markets because Indian buyers often compete with import cargoes from China and the Middle East.
For an international buyer, understanding such regional demand hubs can help forecast the sodium sulphate wholesale price. If Gujarat’s sulphide plants are running at high capacity, it’s wise to lock in forward contracts early. Our team at Hailei monitors these downstream trends to advise clients on optimal purchasing windows.
When a supplier quotes a price, what should you compare it against? Here’s a practical framework:
Never compare an ex-works price in China directly with a delivered-duty-paid quote to a European buyer. Always normalize to a common Incoterms® basis. At Hailei Chemical, we quote predominantly FOB Qingdao or CFR to your named port, with detailed freight breakdowns. This transparency allows you to see exactly how much of the sodium sulphate price is product cost versus logistics.
L/C at sight, T/T in advance, or open account terms after credit evaluation all carry different risk premiums. A supplier might quote a slightly higher per-ton price for 30-day T/T compared to an irrevocable L/C because of the working capital burden. Similarly, a 12-month contract with scheduled liftings will command a much better sodium sulphate wholesale price than spot buys of one container each month.
A price that seems too low may hide quality shortcuts—excess moisture (meaning you pay for water), poor whiteness affecting detergent brand appeal, or silo storage contamination. By contrast, our high-purity sodium sulphate comes with consistent CoA data, ISO 9001-certified manufacturing, and pre-shipment inspection by SGS or Bureau Veritas if requested. Those intangibles protect your production yields and brand reputation.
Beyond simply negotiating harder, consider these procurement levers:
Upon arrival, your QC lab should verify at least these parameters to ensure the delivered product matches the promised sodium sulphate price value:
If any parameter deviates, it’s a legitimate claim. A reliable supplier will offer a documented non-conformance process. At Hailei Chemical, we provide a minimum 24-month quality guarantee from shipment date under proper storage conditions.
The global sodium sulphate market is projected to grow at a steady 3.5% CAGR through 2030, driven by booming detergent production in Southeast Asia and Africa, plus renewable energy glass (solar panels) demand. On the supply side, China’s ongoing consolidation of small-scale polluting plants is shifting market share to larger producers with genuine cost efficiencies. This structural change is gradually stabilizing the sodium sulphate wholesale price and reducing extreme volatility. For buyers, the key is to partner with a supplier having diversified raw material sources and robust logistics networks—attributes that define our model at Hailei Chemical.
Whether you need a single container trial order or an annual supply arrangement, Weifang Hailei Fine Chemical Co., Ltd. brings you factory-direct pricing, consistent 99% purity, and flexible logistics solutions. Our team can provide a tailored quotation within 24 hours, including technical data sheets, packaging options, and shipment schedules to your port. Don’t let fluctuating markets catch you off guard—let’s build a sourcing plan that protects your margins.
Request your personalized sodium sulphate quotation today or explore the detailed specifications on our sodium sulphate product page.