Application: It is destinated to manufacture glass and enamel, as well as in electronics to manufacture tubes glass. Saltpetre is used as oxidizer substance in black powder and some explosives. Chemical composition: AD StandardPotassium Nitrate KNO3: min. 99,5%  Water H2O :max. 0,2% Chlorides as NaCl: max. 0,06% Calcium and Magnesium Oxides as CaO: max. 0,05% Iron as Fe+3: max. 0,0005% Reducing substances as KN02: max. 0,01% Heavy metals as Pb+2: max. 0,002% Matter insoluble in water: max. 0,02% Melting temperature: 334-339oC  Anticaking agent (as wished): min. 0,03-0,06% State of aggregation: crystalline form Colour: white Smell: no smell Standard: Potassium Nitrate KNO3: min. 99,0%  Water H2O :max. 0,3% Chlorides as NaCl: max. 0,2% Calcium and Magnesium Oxides as CaO: max. 0,05% Iron as Fe+3: max. 0,001% Reducing substances as KN02: max. 0,01% Heavy metals as Pb+2: max. 0,002% Matter insoluble in water: max. 0,02% Melting temperature: