Potassium Nitrate Molecular Formula: KNO3 Applications and Usages: It is used for making fireworks, black powder, match, ceramica, glass. Specification: Potassium Nitrate: >=99.5% Moisture: <=0.07% Chloride (as Cl): <=0.01% Sulfate (as SO4): <=0.01% Water-Insoluble: <=0.008% Moisture Rate: <=0.26%