Potassium Sulphate

Potassium Sulphate is an inorganic compound in the form of a white water-soluble solid. Potassium Sulphate is typically produced by the reaction of potassium chloride with sulfuric acid. The mineral form of Potassium Sulphate, arcanite, is relatively rare.


Molar Weight174.26 g/mol
Melting Point1,069°C
Boiling Point1689°C
Flash Pointnon flammable
Density2.66 g/cm³
FormsCrystals (large), Powder (dry), Pellets

Uses and Applications

Key applications

  • Medicines
  • Fertiliser
  • Acidifying agent
  • Rubber
  • Feedstock


  • Pharma
  • Coatings & Construction
  • Animal Nutrition
  • Food
  • Agrobusiness
  • Chemical Processing

Synonyms: Sulphate of Potash, SOP, E515i

Chemical Formula: K2SO4

CAS Number: 7778-80-5