... crystal powder HS NO.2834.2190, UN NO.1486,CLASS 5.1 Potassium nitrate colorless crystal powder, Relative density2.1109, Melting Point ... , rifampin drugs. used for making cigarette paper. used as a catalyst and mineral processing agent. ceramic industry used in the ... agent; preservatives, such as for bacon, luncheon meat played a preservative.. Potassium Nitrate industrial grade KNO3 CAS NO#7757-79 ...