Dextran Sulphate Sodium Salt Price: What Research Labs Pay vs. Industrial Anhydrous Sodium Sulphate Costs | Hailei Chemical

If you’re sourcing specialty chemicals for biomedical research, the dextran sulphate sodium salt price can hit $500 per kilogram or more. That’s a world away from bulk anhydrous sodium sulphate (Na₂SO₄), which trades at just a few hundred dollars per metric ton. This isn’t just a price difference—it’s a reflection of fundamentally different manufacturing processes, purity demands, and end-use markets. For procurement managers in detergent, glass, textile, and pulp industries, understanding why dextran sulfate sodium (DSS) commands such a premium offers valuable insight into the cost structure of sodium-based compounds. It also underscores why choosing the right anhydrous sodium sulphate supplier matters for keeping operations efficient.

What Is Dextran Sulphate Sodium Salt and Why Is It So Expensive?

Dextran sulphate sodium salt is a sulfated polysaccharide. It starts as dextran—a bacterial exopolysaccharide produced by Leuconostoc mesenteroides. The synthesis involves controlled sulfation of dextran with chlorosulfonic acid, followed by careful purification and conversion to the sodium salt. The final product packs a high sulfur content (typically 16–20% elemental sulfur), a narrow molecular weight distribution, and stringent endotoxin limits. All of this is critical for its main use: inducing colitis in laboratory animal models. So what drives the dextran sulphate sodium salt price? Let’s break it down:

• Complex multi-step synthesis: Unlike simple inorganic salts, DSS requires fermentation, dextran purification, and chemical modification under anhydrous conditions. Each step adds time and cost.
• Strict quality control: Biomedical-grade DSS must meet tight specs for molecular weight distribution, degree of sulfation, heavy metals below 10 ppm, and endotoxin levels under 0.1 EU/mg. Batch-to-batch consistency is non-negotiable for reproducible research.
• Limited production scale: DSS is produced in small lots—grams to kilograms—by a handful of specialized biochemical suppliers. Bulk chemical manufacturers don’t touch this stuff.
• Regulatory overhead: Handling chlorosulfonic acid and shipping a research chemical means compliance with hazardous goods regulations and often Controlled Substance Act precursors monitoring. That adds paperwork and cost.

A typical research lab might pay $200–$600 per kilogram for dextran sulfate sodium salt, depending on molecular weight and purity grade. In contrast, industrial-grade anhydrous sodium sulphate (Na₂SO₄, purity 99%) can be delivered in 25 kg bags or bulk vessels at $80–$150 per metric ton FOB China. That’s about a 2500-fold price difference. It highlights the commodity nature of industrial sodium sulfate versus the highly specialized character of DSS. Experienced procurement teams know that comparing these two is like comparing table salt to a custom-synthesized pharmaceutical intermediate—they share a common element, but that’s where the similarity ends.

Industrial Anhydrous Sodium Sulphate: A Commodity with Stable Pricing

Anhydrous sodium sulphate (Na₂SO₄) is a white crystalline powder produced on a massive scale—over 6 million metric tons annually in China alone. Most comes as a byproduct of rayon manufacturing, or from natural brine sources and mirabilite deposits. The global market is mature, with pricing driven by feedstock costs, energy prices, and logistics rather than synthesis complexity. For detergent powder manufacturers, glass factories, and pulp mills, the historical price stability of Na₂SO₄ makes it a dependable bulking agent and processing aid. You can plan budgets around it.

Current FOB China prices for 99% pure anhydrous sodium sulphate typically range between $80 and $120 per metric ton for spot cargoes. Contract prices for large volume buyers—think 5,000 MT or more annually—may dip below $70/MT on a CFR basis. In stark contrast, the dextran sulphate sodium salt price remains highly volatile and opaque. Quotes vary dramatically between suppliers due to the specialized nature of the product. A common mistake is assuming that all sodium-based compounds follow similar pricing trends. They don’t. Not even close.

What Is Sodium Sulfate Potas? Clearing Up a Common Query

Searchers often type “what is sodium sulfate potas” when looking for technical information. This confusion usually arises from mixing up potassium sulfate (K₂SO₄) with sodium sulfate. “Sodium sulfate potas” isn’t a formal chemical name—it’s a search artifact. It reflects queries about whether potassium is present in sodium sulfate, or about blending the two salts for specific fertilizer or industrial applications. In practice, high-purity anhydrous sodium sulphate contains negligible potassium. Total potassium (as K) is typically below 0.02%, ensuring it doesn’t interfere with glass melting or detergent formulation. If your process requires truly potassium-free sodium sulfate—say, for certain pharmaceutical intermediates—specifying analytical-grade material or getting direct technical consultation from a source like Hailei Chemical is the way to go. Don’t rely on generic spec sheets alone.

Sodium and Sulphate Chemical Formula: The Foundation of Na₂SO₄ Functionality

The sodium and sulphate chemical formula Na₂SO₄ denotes two sodium cations (Na⁺) for every sulfate anion (SO₄²⁻). This simple ionic structure yields a neutral salt that’s highly soluble in water—47.6 g/100 mL at 30°C—and thermally stable up to 884°C. The anhydrous form aggressively absorbs moisture, acting as a desiccant. That’s why it’s used in detergent powders to prevent caking and in glass batches to homogenize silica melting. Commercial grades are manufactured by dehydration of Glauber’s salt (Na₂SO₄·10H₂O) or via the Hargreaves process from sodium chloride and sulfuric acid. Understanding the basic formula helps buyers verify purity claims. Any deviation from stoichiometric Na₂SO₄ indicates contamination—sodium chloride, calcium sulfate, or insoluble matter—all of which can harm downstream processes. In my experience, a simple ignition test can reveal a lot about moisture content and actual sulfate purity.

How Purity Specifications Impact Industrial Sodium Sulphate Pricing

While the dextran sulphate sodium salt price reflects a premium for biological activity, industrial anhydrous sodium sulphate pricing is largely driven by purity tiers. Here’s what you need to know:

• Standard grade (98% min): Suitable for kraft pulping and textile leveling. Contains minor sodium chloride and insolubles. Priced at the low end of the market—typically $80–$90/MT FOB.
• Detergent grade (99% min): Controlled particle size (usually 100–200 mesh) and low iron content (below 20 ppm) to prevent fabric discoloration. Adds a modest premium—say $5–$10/MT—but ensures high filler efficiency and consistent blending.
• Glass grade (99.5% min): Extremely low iron (under 50 ppm Fe₂O₃) and moisture to avoid green tint and reboil in glass melters. Commands the highest price among bulk industrial grades—often $110–$130/MT FOB.

Hailei Chemical supplies 99% purity anhydrous sodium sulphate as standard, with iron content typically below 15 ppm. That makes it suitable for both detergent and glass applications without a steep premium. By procuring directly from our own production lines in Shandong, we eliminate middleman costs and pass the savings on to B2B buyers across Asia, the Middle East, and South America. It’s a practical advantage that shows up in your bottom line.

Key Industrial Applications and Their Sodium Sulphate Quality Demands

Detergent Powder Filler

In spray-dried and dry-blended detergent powders, sodium sulphate acts as an inert filler. It improves powder flow and reduces the active surfactant concentration required per wash dose. The sodium lauryl sulphate price is often benchmarked against sodium sulphate filler cost because formulators balance active cleaning ingredients with bulking agents to hit target price points. While sodium lauryl sulfate (SLS) is an anionic surfactant, anhydrous sodium sulphate provides bulk without chemical reactivity. A typical household detergent powder contains 20–30% Na₂SO₄. Hailei’s consistent particle size distribution (±5% on 100 mesh) ensures homogeneous blending and minimal dusting during filling operations. That might sound like a detail, but in a plant running 50 tons per day, it translates directly to fewer rejects and less downtime.