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Potassium Sulphate 99.9% ACS

Price: £2.95
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Stock Availability
On Shelf - Approx. UK delivery date: Tuesday the 07th October 2025*
In bulk stock - ships within 10 - 12 Working Days (Excluding weekends and public holidays)
4 to 6 weeks approx. (Not guaranteed)
UK Shipping

Unfortunately, we are not currently accepting orders for Northern Ireland, Jersey and Guernsey.

We can only ship to the following postcodes where a Royal Mail postal option has been chosen at checkout.

AB, DD, DG3, DG4, DG6 - DG9, EH, FK, G, HS, IM, IV, KA, KW, KY, ML, PA, PH, PO30 - PO41, TD, TR21 - TR25, ZE

* We will always try to ship as early as possible. Delivery could be much quicker than stated but is not guaranteed
  • Fertiliser
  • Glass Manufacture
  • General Laboratory Reagent
  • Flash Reducer in Artillery Propellant

Potassium sulfate (K2SO4) (in British English potassium sulphate, also called sulphate of potash, arcanite, or archaically known as potash of sulfur) is a non-flammable white crystalline salt which is soluble in water.

  • Minimum Assay: >99.9%
  • Molecular Formula: K2SO4
  • Molecular Weight: 174.25 g/mol
  • Melting Point: 1069 °C
  • Insoluble Matter: <0.1%
  • Cadmium (Cd): <0.01%
  • Magnesium (Mg): <0.005%
  • Iron (Fe): <5ppm
  • Sodium (Na): <0.02%
  • Heavy Metals (as Pb): <5ppm

Hazard Phrases: Not considered harmful under normal laboratory conditions

Cas No: 7778-80-5
Einecs No: 231-915-5

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Source Chemicals Ltd