Chemical Formula: KNO?
Molecular Weight: 101.10 g/mol
Potassium Nitrate is a white crystalline, highly soluble inorganic salt that supplies readily available potassium (K?) and nitrate (NO??) ions. It is valued for its stable composition, strong oxidizing properties, and wide utility across agriculture, pyrotechnics, industrial chemistry, and metal processing. Supplied as prills or granules, this technical-grade product offers good shelf stability when kept dry and away from combustible or organic materials.
Agriculture / Fertilizer:
Used as a high-grade potassium and nitrogen fertilizer (suitable for fertigation, foliar feed, and specialty crop applications) — beneficial where chloride-free potassium is required.
Pyrotechnics & Explosives:
Widely used as an oxidizer in pyrotechnic compositions, propellants, and some explosive formulations (handled under regulatory controls).
Food & Curing (industry grades):
Historically used in food curing and preservation (regulated; food-grade only).
Glass, Ceramics & Metallurgy:
Used in specialty glass and ceramic formulations, and in heat-treatment salts.
Chemical Industry & Laboratory:
Used as an oxidizing reagent, in nitration processes, and as a laboratory standard.
| Property | Description |
|---|---|
| Appearance | White crystalline granules / prills |
| Solubility | Soluble in water (≈ 31.6 g/100 mL at 20°C); poorly soluble in alcohol |
| Purity (assay) | ≥ 98% (typical technical grade) |
| Moisture | ≤ 0.5 – 1.0% (grade dependent) |
| pH (1% solution) | ~6.5 – 7.5 |
| Density | Crystal density ≈ 2.10 g/cm³; bulk density varies (≈ 1.0–1.3 g/cm³ for prills) |
| Grade | Technical / Fertilizer / Industrial / Food (where specified) |
| Packaging | 25 kg / 50 kg kraft or HDPE-lined bags; bulk tanker or bulk bags on request |
| Storage | Store in a cool, dry, well-ventilated area away from heat, moisture, combustible/organic materials, reducing agents and acids. Keep containers tightly closed. |