Potassium Nitrate 99% ACS Reagent, CAS 7757-79-1

art: ch7757-79-1
Formula KNO3
Molar mass 101.102 g/mol
CAS number 7757-79-1

Available Options

0.1kg Potassium Nitrate 99% ACS Reagent$15.00
0.5kg Potassium Nitrate 99% ACS Reagent$70.00
2.5KG Potassium Nitrate 99% ACS Reagent$350.00


Potassium nitrate is a white to dirty gray crystalline solid. Water soluble. Noncombustible, but accelerates the burning of combustible materials. If large quantities are involved in fire or the combustible material is finely divided an explosion may result. May explode under prolonged exposure to heat or fire. Toxic oxides of nitrogen are produced in fires. Used in solid propellants, explosives, fertilizers. Potassium nitrate has a chemical formula of KNO3. It is an ionic salt of potassium ions K+ and nitrate ions NO3-, and is therefore an alkali metal nitrate. It is a natural source of nitrate and has been used as a constituent for several different purposes, including food preservatives, fertilizers, tree stump removal, rocket propellants and fireworks. Potassium nitrate is a common active ingredient in dentrifices where it exerts an antisensitivity action. It provides increasing protection against painful sensitivity of the teeth to cold, heat, acids, sweets or contact.

Molar mass
101.102 g/mol
CAS Number
2.11 g/cm3
≥99.0% (ACS Reagent)
Water solubility
350 g/l – completely soluble
Melting point/freezing point
334°C (633°F) – lit.
Decomposition temperature
400 °C (752 °F)


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