Potassium Nitrate also known as saltpeter has a wide variety of industrial applications, itâ??s used to manufacture glass, temper steel, in energy storage salts, itâ??s used in fireworks, fluxes, matches, explosives, rocket propellants, fertilizers, and baths for silver and copper plating; itâ??s used to support combustion in gas cartridges. Industrial use only. Potassium Nitrate WC Code: 16-022-01 Sales Specification Appearance: White Prilled Apparent Density: 1200kg/m3 Melting Point: 333?C Solubility in Water: 31kg/ 100kg water to 20?C Purity as KNO3: 98% Min Chloride: 0.3 % Max Fe: < 5 ppm Cu: < 1 ppm Cr: < 1 ppm Pb: < 5 ppm As: < 0.2 ppm Packing 55.12 lb Bag, 40 bags per pallet DOT Transportation UN/NA: UN1486 Proper Shipping Name: Potassium Nitrate Hazard Class: 5.1 Packing Group: III Marine Pollutant: No