Molekula
Potassium sulfate (EP Grade)
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 (EP Grade) is a high-purity inorganic salt used primarily as a fertilizer to provide potassium and sulfur to crops, and in pharmaceuticals under European Pharmacopoeia standards. It is also used in food processing and as a flame retardant. This product has a CAS number of 7778-80-5, with a molecular formula of K2SO4 and a molecular weight of 174.26. It is stored at ambient conditions, with no signal word for hazard classification. Molekula supplies Potassium sulfate (EP Grade) 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.
-
1 kg — £30.90 per pack ex VAT · £37.08 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 crystalline powder |
| Grade | Ph. Eur. |
| Loss on Drying | ≤ 1.000% |
| Chloride (Cl-) | ≤ 0.004% |
| Iron (Fe) | ≤ 0.001% |
| Calcium (Ca) | ≤ 0.020% |
| Magnesium (Mg) | ≤ 0.002% |
| Sodium (Na) | ≤ 0.100% |
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 | 15625143 |
| 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
No alternate names recorded for this product.
Frequently asked questions
What is potassium sulfate (EP Grade) used for?
Potassium sulfate (EP Grade) is primarily used as a fertilizer to provide potassium and sulfur to plants, improving crop yield and quality, and is also used in food-grade applications as the permitted food additive E515 and as a nutrient supplement.
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 (EP Grade) be stored?
Store in a cool, dry, and well-ventilated area at ambient temperature, away from moisture and incompatible substances.
What grade of potassium sulfate does Molekula supply?
Molekula supplies EP (European Pharmacopoeia) Grade potassium sulfate, meeting strict purity standards for food and pharmaceutical applications.
Can Molekula supply potassium sulfate in bulk quantities?
Yes, Molekula can supply potassium sulfate in bulk, with quantities tailored to your requirements—please contact us for pricing and logistics details.
What documentation comes with an order of potassium sulfate?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a Certificate of Conformity for EP Grade compliance.
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.