Potassium nitrate
CAS 7757-79-1KNO3101.103 g/mol
Potassium nitrate is the inorganic nitrate salt of potassium. It has a role as a fertilizer. It is a potassium salt and an inorganic nitrate salt.
IUPAC: potassium nitrate
PubChem
Physical & Chemical Properties
| Melting Point | 633.2 °F (USCG, 1999) |
| Boiling Point | 752 °F at 760 mmHg (decomposes) (USCG, 1999) |
| Density | 2.109 (USCG, 1999) - Denser than water; will sink |
| Solubility | 35g/100ml |
| pH | 4,5-8,5 (5 % solution) |
| Appearance | Potassium nitrate appears as 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. |
Data: PubChem · Last updated: 4/20/2026
GHS Classification
No GHS classification data available.
Classification data is sourced from ECHA.
Regulatory Compliance
TSCA
Listed
note: Status based on EPA TSCA Active Inventory · inventory name: TSCA Chemical Substance Inventory
View sourceGlobal Trade Intelligence
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HS Code(s): 3105
Data: UN Comtrade
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