... .8% 1, Fireworks Potassium Nitrate 2, Black Powder Potassium Nitrate 3, High Purity Nitrate 99.8% min Molecular Formula: KNO3Applications and Usages: ... making fireworks, black powder, match and so on.Potassium Nitrate Specification: -Potassium Nitrate: 99.8% Min-Moisture: 0.01% Max-Chloride ... -Insoluble: 0.01% Max-Iron: 0.003% MaxPotassium Nitrate Storage:Store in a cool, dry, well-ventilated place away ...