... crystal or white crystal powder HS NO.2834.2190, UN NO.1486,CLASS 5.1 Potassium nitrate colorless crystal powder, Relative density2 ... black powder, such as mining gunpowder, fuse , firecrackers and other raw materials. pharmaceutical industry for the production of potassium penicillin, ... in the manufacture of ceramic glazes. heat bath. Potassium nitrate in food consumption industry as a hair color ...