Potassium nitrate (saltpeter) has a molecular formula of KNO. It is found as a transparent to white crystalline powder and as crystals. Potassium nitrate is water soluble and is a dangerous fire and explosion risk when heated or shocked or in contact with organic materials. It is a strong oxidizers agent, with four-digit UN identification number of 1486. Potassium nitrate is used in the manufacture of pyrotechnics, explosions, and matches. It is often used in the illegal manufacture of homemade pyrotechnics and explosives