Potassium Nitrate

Potassium nitrate is a chemical compound which forms colourless crystals. It is an ionic salt of potassium ions K+ and nitrate ions NO3−, and is therefore an alkali metal nitrate. It occurs in nature as a mineral. It is a source of nitrogen.


Molar Weight101.103 g/mol
Melting Point334°C
Boiling Point400°C (decomposes)
Density2.109 g/cm³
FormsPowder, Colourless

Uses and Applications

Key applications

  • Explosives
  • Food preservatives
  • Oxidising agent
  • Pyrotechnics
  • Pharmaceuticals
  • Cosmetic products
  • Macronutrient


  • Pharma
  • Oil & Gas
  • Cosmetics
  • Water Treatment
  • Food
  • Animal Nutrition
  • Agrobusiness
  • Lubricants

Synonyms: Saltpeter, Saltpetre, Nitrate of potash, E252

Chemical Formula: KNO3

CAS Number: 7757-79-1