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Potassium nitrate (CAS 7757-79-1)


Potassium nitrate (CAS 7757-79-1)

Potassium nitrate is a chemical compound with the chemical formula KNO3. 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, niter (or nitre in the UK). It is a source of nitrogen, and nitrogen was named after niter. Potassium nitrate is one of several nitrogen-containing compounds collectively referred to as saltpetre (or saltpeter in North America).

Major uses of potassium nitrate are in fertilizers, tree stump removal, rocket propellants and fireworks. It is one of the major constituents of gunpowder (black powder). In processed meats, potassium nitrate reacts with hemoglobin and myoglobin generating a blue color.


Industries: Household chemicals, Fertilizers, A-Z catalog, Horticulture, Food industry
Composition: Products A-Z, Nitric acid salts – nitrates, Potassium compounds, Nitrogen compounds
CAS number: 7757-79-1
WE number: 231-818-8
Chemical formula: KNO3
Molar mass: 101,10 g/mol
ADR: UN1486

Other physical properties

pH: 3 – 11 (1% roztwór)
Melting / freezing point: 334°C
Relative density: 2,1 g/cm3
Solubility in water: 32 g/100 ml

Additional information

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