TCS Industries Limited (China-sourced API supplier) supplies Sodium Sulfate –-– Inorganic Salt for Industrial & Osmotic Uses CAS 7757-82-6 for pharmaceutical B2B procurement — COA, MSDS, and technical documentation available on request.
> Overview
| Product Name | Sodium Sulfate –-– Inorganic Salt for Industrial & Osmotic Uses |
|---|---|
| Structural Formula |  |
| CAS Number | 7757-82-6 |
| Molecular Formula | Na2O4S |
| Molecular Weight | 142.04 g/mol |
| InChIKey | PMZURENOXWZQFD-UHFFFAOYSA-L |
| SMILES | Available on request where applicable |
| Appearance | White crystalline powder or granules |
| Purity / Grade | By agreed specification and batch COA |
| Storage | Keep tightly closed in a cool, dry, well-ventilated place |
Sodium Sulfate (CAS 7757-82-6) is an inorganic salt with the formula Na₂SO₄ (anhydrous, MW 142.04 g/mol). The decahydrate form (Glauber salt, Na₂SO₄·10H₂O, CAS 7727-73-3) is used in pharmaceutical osmotic laxative preparations. Anhydrous sodium sulfate is one of the highest-volume industrial chemicals globally, consumed in detergent manufacturing, pulp and paper (kraft process), glass production, and textile dyeing.
TCS Industries Limited, a Hong Kong-based trading and sourcing company, supplies Sodium Sulfate in industrial, food and pharmaceutical grades for global procurement programs.
> Applications
Detergent filler and processing aid
Anhydrous sodium sulfate is the primary filler in powder laundry detergents, typically comprising 15–40% of the formulation. It improves flowability, controls bulk density, and acts as a diluent for concentrated surfactant blends. The global detergent industry is the largest single consumer of sodium sulfate. Technical-grade material must have controlled moisture, whiteness (L* value), and iron content to avoid product discoloration.
Pharmaceutical osmotic laxative and excipient
Sodium sulfate (as the decahydrate, Glauber salt) is an osmotic laxative used for bowel preparation before colonoscopy. In combination with sodium, potassium and magnesium sulfates (Suprep, Suclear), it provides high-volume lavage. Anhydrous sodium sulfate is also used as a pharmaceutical excipient for granulation and as a drying agent. Di Palma et al. (Am J Gastroenterol, 2009, 104:2275–2284) evaluated sulfate-based bowel preparation efficacy.
> Sourcing & Supply
TCS Industries Limited supports development, qualification and commercial purchasing discussions for Sodium Sulfate –-– Inorganic Salt for Industrial & Osmotic Uses with buyers in South America, Europe, the United Kingdom, Australia, New Zealand, Mexico and Canada.
- Evaluation and commercial quantities: 25 kg bags for qualification; pallet and bulk (FIBC) for production. Anhydrous and decahydrate (Glauber salt) forms in industrial, food and pharma grades.
- Pallet quantities and production campaigns: repeat supply is coordinated against packaging, lead time, annual demand and destination-market import requirements.
> Quality & Documentation
Key specification parameters include assay (≥99.0% Na₂SO₄ on dried basis for pharma/food grade; ≥99.0% for industrial grade), moisture (critical for detergent filler — typically ≤0.05% for anhydrous), chloride, iron, calcium, magnesium, heavy metals, pH, and whiteness index. Pharmaceutical grade must meet USP-NF or Ph.Eur. specifications. Food grade must meet FCC or EU food additive criteria. COA and MSDS are standard.
> Packaging
Anhydrous Sodium Sulfate is mildly hygroscopic; the decahydrate (Glauber salt) loses water above 32.4 °C and should be stored below 25 °C. Standard packaging includes 25 kg or 50 kg woven PP bags (industrial grade), 25 kg paper bags (food/pharma grade), and palletized shrink-wrapped units. 1000 kg FIBC for bulk orders. Labels and documents are checked before dispatch.
> Pricing & MOQ
Pricing is quoted by specification, packaging and destination. Common commercial discussions use 25 kg bag/drum formats, pallet quantities and production-campaign planning; smaller samples may be reviewed for qualified formulation teams.
> Regulatory & Compounding Context
Sodium Sulfate is monographed in USP-NF and Ph.Eur. (Natrii sulfas anhydricus / decahydricus). It is approved as food additive E514 in the EU and GRAS in the US. Listed in the FDA IID. REACH-registered. No special import permits for standard grades. Classified as non-hazardous for transport. Buyers should specify anhydrous vs. decahydrate form, grade and applicable standard at inquiry.
> Alias Index
- IUPAC: Disodium sulfate
- CAS Number: 7757-82-6 (anhydrous); 7727-73-3 (decahydrate, Glauber salt)
- Formula: Na₂SO₄ (MW 142.04); Na₂SO₄·10H₂O (MW 322.20)
- Common names: Glauber salt (decahydrate), Thenardite (mineral, anhydrous), Mirabilite (mineral, decahydrate)
- EU food additive: E514
- Pharmacopoeial names: Natrii sulfas anhydricus / decahydricus (Ph.Eur.)
- InChIKey: PMZURENOXWZQFD-UHFFFAOYSA-L
- Commercial request terms: sodium sulfate anhydrous, Glauber salt, Na2SO4 pharma grade, detergent filler, E514, TCS Industries Limited
> FAQ
What is the difference between anhydrous Sodium Sulfate and Glauber salt?
Anhydrous Sodium Sulfate (CAS 7757-82-6, Na₂SO₄) is the water-free form used in detergent, glass and industrial applications. Glauber salt (CAS 7727-73-3, Na₂SO₄·10H₂O) is the decahydrate used in pharmaceutical laxative preparations and heat storage. They have different CAS numbers, molecular weights and applications.
What documents are available for Sodium Sulfate –-– Inorganic Salt for Industrial & Osmotic Uses orders?
COA and MSDS are standard for commercial discussions. COO, packing list, invoice and other import-support documents can be arranged according to order scope.
Can TCS Industries Limited support Sodium Sulfate –-– Inorganic Salt for Industrial & Osmotic Uses supply to South America?
Yes. We support B2B buyers in Argentina, Colombia, Chile, Peru, Ecuador, Uruguay, Bolivia, Brazil, Paraguay, Venezuela, Guyana and Suriname, subject to route and document review.
Do you support Europe, the United Kingdom, Australia, New Zealand, Mexico and Canada?
Yes. These destinations can be reviewed for project supply, import documents, packaging and logistics planning before quotation.
Is Sodium Sulfate used in pharmaceutical bowel preparation?
Yes. Sodium sulfate (as the decahydrate) is an osmotic laxative used in sulfate-based bowel preparation solutions for colonoscopy. Combined with other sulfate salts and electrolytes, it provides effective lavage with lower volume than traditional PEG-based preparations.
What is the moisture specification for detergent-grade Sodium Sulfate?
Detergent-grade anhydrous sodium sulfate typically requires moisture ≤0.05% (50 ppm) to prevent caking in powder detergent formulations. Iron content (≤5 ppm) and whiteness (L* ≥95) are also critical for consumer product appearance. Specify detergent-grade requirements at inquiry.
Can you arrange samples before commercial purchasing?
Samples or evaluation quantities may be reviewed for qualified buyers after target specification, application and destination-market requirements are clarified.
How is Sodium Sulfate –-– Inorganic Salt for Industrial & Osmotic Uses packaged for export?
Packaging is confirmed by quantity and material properties. Typical options include foil bags, HDPE containers, fibre drums, 25 kg bags or palletized export packaging.
Can buyer-defined specifications be reviewed?
Yes. Send the specification, methods, impurity limits and required documents. TCS can review feasibility before confirming quotation and lead time.
What payment terms are normally used?
Standard payment is 100% T/T before dispatch unless a different arrangement has been approved for an established commercial account.
What lead time should buyers expect?
Lead time depends on stock, batch size, document scope and destination. Available stock can move faster; made-to-order or pallet programs require longer planning.
Is Sodium Sulfate hazardous for transport?
No. Sodium Sulfate (both anhydrous and decahydrate) is classified as non-hazardous for transport under ADR/IMDG/DOT regulations. No special packaging, labeling or dangerous goods documentation is required. Standard commercial packaging and shipping procedures apply.
Last reviewed: June 2026
Evaluation and research orders (≤10 kg) are shipped with COA, MSDS, and certificate of origin. Bulk commercial orders (>10 kg) qualify for volume pricing with a full technical documentation package available on request.
> Request a Quote
If your team already has a target application, estimated quantity, destination market, or documentation requirements, send those details so the commercial response can be prepared more efficiently.