CAS.7757-79-1 Potassium nitrate is the raw material for the manufacture of black powder, such as mine powder, ignition wire, firecrackers, etc. Also used in fireworks to produce purple sparks. A salt bath for quenching by mechanical heat treatment. The ceramic industry is used in the manufacture of enamels. Used as a glass clarifying agent. Used in the manufacture of automobile lamp glass, optical glass picture tube glass, etc. The pharmaceutical industry is used in the production of penicillin potassium salt, rifamiequality drugs. Used to make cigarette paper. Used as a catalyst. Beneficiation agent. Used as a compound fertilizer for crops and flowers. Potassium nitrate is also a hair color permitted . It is reduced to potassium nitrite in meat products due to the action of bacteria and plays the role of color protection and bacteriostasis. We can provide 99.4%, 99.8% high purity and high quality potassium nitrate.