Molekula
Sodium sulfate
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Sodium sulfate (Na₂SO₄) is an inorganic salt widely used in detergents, textile processing, and as a drying agent in chemical synthesis. It appears as a white crystalline solid with high solubility in water. CAS 7757-82-6, molecular weight 142.04 g/mol, stable at ambient storage with no signal word warnings. Molekula supplies sodium sulfate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Often bought together
Pricing & pack sizes
In stock — same-day dispatch
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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500 g — £19.70 per pack ex VAT · £23.64 inc. VAT
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1 kg — £26.40 per pack ex VAT · £31.68 inc. VAT
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5 kg — £61.50 per pack ex VAT · £73.80 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White powder |
| Identification | Conforms to reference |
| pH | 6.0 - 8.0 |
| Assay | ≥ 98.0% |
| Insoluble Matter | ⩽ 0.005% |
| Moisture | ⩽ 1.0% |
| Cadmium (Cd) | ⩽1.0ppm |
| Iron (Fe) | ⩽ 10.0ppm |
| Lead (Pb) | ⩽ 3.0ppm |
| Mercury (Hg) | ⩽ 0.1ppm |
| Arsenic (As) | ⩽ 1.0ppm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White orthorhombic crystals or powder |
| Odour | Odorless |
| Melting Point | 884 °C |
| Density | 2.7 (relative, water = 1) |
| Solubility (other solvents) | Soluble in glycerin; insoluble in alcohol |
| Refractive Index | 1.484 |
Source: PubChem CID 24436 (HSDB, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 28905333 |
| CAS Number | 7757-82-6 |
| IUPAC Name | disodium;sulfate |
| EC Number | 231-820-9 |
| Molecular Formula | Na2SO4 |
| Molecular Weight | 142.04 |
| Exact Mass | 141.9313 |
| SMILES | [O-]S(=O)(=O)[O-].[Na+].[Na+] |
| InChIKey | PMZURENOXWZQFD-UHFFFAOYSA-L |
| InChI | InChI=1S/2Na.H2O4S/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2*+1;/p-2 |
| PubChem CID | 24436 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 28331150 |
| Tariff Code | 2833110000 |
Safety & GHS
Precautionary statements
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- Bisodium sulfate
- Disodium sulfate
- Disodium sulphate
- Salt cake
- Sodium sulfate (2:1)
- Sodium sulfate anhydrous
- Sodium sulfate, dried
- Sodium sulphate
- Sodium sulphate anhydrous
- Sulfuric acid disodium salt
Frequently asked questions
What is sodium sulfate commonly used for?
Sodium sulfate (Na₂SO₄) is primarily used in detergents, textiles (as a dye fixative), and as a filler in paper manufacturing, as well as in chemical synthesis and water treatment.
What is the molecular formula and molecular weight of sodium sulfate?
The molecular formula is **Na₂SO₄**, and the molecular weight is **142.04 g/mol**.
How should sodium sulfate be stored?
Store sodium sulfate in a cool, dry place at **ambient temperature**, away from moisture and incompatible substances.
What grades of sodium sulfate does Molekula supply?
Molekula supplies **technical grade** and **anhydrous sodium sulfate** (food-grade available upon request).
Can Molekula supply sodium sulfate in bulk quantities?
Yes, we offer **bulk packaging** (25 kg bags, 1-tonne super sacks, or custom quantities) for industrial and commercial needs.
What documentation comes with a sodium sulfate order?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a **packing list** for traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.