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Chemical name:Potassium nitrate
Indicator:GB 1918-1998
Molecular formula:KNO3
Molecular weight:101.10
Quality standard:
| Item | Indicator | |||
| High purity | Excellent | First grade | Agriculture grade | |
| Potassium nitrate (KNO3) content | ≥99.9% | ≥99.8% | ≥99.4% | ≥98.0% |
| Moisture content | ≤0.10% | ≤0.10% | ≤0.10% | ≤0.10% |
| Chloride ( Cl-) | ≤0.005% | ≤0.01% | ≤0.01% | ≤0.10% |
| Water insoluble | ≤0.005% | ≤0.01% | ≤0.01% | ≤0.10% |
| Sulfate ( SO42-) | ≤0.003% | ≤0.005% | ≤0.005% | --- |
| Moisture absorption | ≤0.20% | ≤0.25% | ≤0.25% | --- |
| Iron(Fe ) content | ≤0.001% | ≤0.003% | ≤0.003% | |
| Potassium (K2O) content | --- | --- | --- | ≥46.0% |
| Nitrogen (N ) content | --- | --- | --- | ≥13.5% |
