Molekula
Potassium 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
Potassium sulfate (K2SO4) is a water-soluble inorganic salt primarily used as a fertilizer to supply potassium and sulfur to crops, improving yield and soil health. It is also employed in industrial applications such as a food additive (E515) and in the production of glass and ceramics. CAS 7778-80-5, molecular weight 174.26 g/mol, stable at ambient storage with no signal word required. Molekula supplies potassium 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.
Pricing & pack sizes
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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 |
| Loss on Drying | ≤ 1.000% |
| Flame test | Lilac flame |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless or white crystals, or white granules or powder |
| Odour | Odorless |
| Melting Point | 1067 °C |
| Boiling Point | 1689 °C |
| Solubility (other solvents) | Freely soluble in water, insoluble in ethanol |
| Refractive Index | 1.494 |
Source: PubChem CID 24507 (HSDB, ICSC, EU Food Improvement Agents)
Identification
| Property | Value |
|---|---|
| SKU | 90033603 |
| CAS Number | 7778-80-5 |
| IUPAC Name | dipotassium;sulfate |
| EC Number | 231-915-5 |
| Molecular Formula | K2SO4 |
| Molecular Weight | 174.26 |
| Exact Mass | 173.8791 |
| SMILES | [O-]S(=O)(=O)[O-].[K+].[K+] |
| InChIKey | OTYBMLCTZGSZBG-UHFFFAOYSA-L |
| InChI | InChI=1S/2K.H2O4S/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2*+1;/p-2 |
| PubChem CID | 24507 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 31051000 |
| Tariff Code | 3105100090 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
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
- Arcanum duplicatum
- Dipotassium sulfate
- Kali sulphuricum
- Kalium sulphuricum
- Potassium (as sulfate)
- Potassium sulfate (K2(SO4))
- Potassium sulphate
- Sulfuric acid dipotassium salt
- Sulfuric acid potassium salt (1:2)
- Tartarus vitriolatus
Frequently asked questions
What is potassium sulfate commonly used for?
Potassium sulfate is primarily used as a fertilizer to supply potassium and sulfur to plants, improving crop yield and quality, and is also used in the production of glass, matches, and as a food additive (E515).
What is the chemical formula and molecular weight of potassium sulfate?
The chemical formula is **K₂SO₄**, and the molecular weight is **174.26 g/mol**.
How should potassium sulfate be stored?
Store potassium sulfate in a cool, dry, and well-ventilated area at **ambient temperature**, away from moisture and incompatible substances.
What grades of potassium sulfate does Molekula supply?
Molekula supplies **technical grade** and **fertilizer grade** potassium sulfate, depending on purity and application requirements.
Can Molekula supply potassium sulfate in bulk quantities?
Yes, Molekula can supply potassium sulfate in **bulk quantities** (e.g., 25 kg bags, 1-tonne containers, or custom packaging) for industrial and commercial use.
What documentation comes with a potassium sulfate order?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** 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.