The Potassium Nitrate is a chemical compound with the formula KNO3. An ionic salt of potassium ions, it is an alkali metal nitrate. This compound is considered as one of several excellent nitrogen-containing compounds. Widely used in fertilizers, rocket propellant and firework, the chemical compound is water soluble and noncombustible. In addition, it is also used in explosives, agriculture, solar energy plants, food and pharmaceutical industry.