Molekula
Potassium Sulphate pure crystals
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 sulphate pure crystals are a water-soluble, inorganic compound used primarily as a potassium fertilizer in agriculture and in the production of specialty chemicals. It is also used in glass manufacturing, as a setting accelerator in gypsum cements and wallboard, in alum production, and as a reagent in analytical chemistry. It is a white crystalline solid with no signal word required for safety. CAS: 7778-80-5, Molecular formula: K2SO4, Molecular weight: 174.26 g/mol, Storage: Ambient. Molekula supplies Potassium Sulphate pure crystals 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
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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1 kg — $123.50 per pack
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 to Off-white powder |
| Assay (NaOH) | ≥ 99.0% |
| Solubility in water | clear colourless solution, no precipitate (10% , 20°C) |
| Loss on Drying @ (130°C) | ≤1.0% |
| Identification (RAMAN) | Conforms to Reference |
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 | 90023784 |
| 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 Sulphate pure crystals used for?
It is primarily used as a potassium fertilizer in agriculture and as a source of sulfate ions in chemical synthesis.
What is the chemical formula and molecular weight of Potassium Sulphate pure crystals?
The formula is K2SO4 with a molecular weight of 174.26 g/mol.
How should Potassium Sulphate pure crystals be stored?
Store at ambient temperature in a dry, well-ventilated area away from moisture and incompatible materials.
What grade of Potassium Sulphate pure crystals is available?
We supply it as pure crystals, suitable for laboratory and industrial applications.
Can Molekula supply Potassium Sulphate pure crystals in bulk?
Yes, we can supply bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with an order of Potassium Sulphate pure crystals?
Each order includes a Certificate of Analysis (CoA) and safety data sheet (SDS) upon request.
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.