Molekula
Sodium sulfate
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · 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
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.
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.