Sodium nitrate is the chemical compound with the formula NaNO. This alkali metal nitrate salt is also known as Chile saltpeter to distinguish it from ordinary saltpeter, potassium nitrate. The mineral form is also known as nitratine, nitratite or soda niter. Sodium nitrate is a white solid very soluble in water
Sodium nitrate is used as a food preservative and a salt substitute. It is also used in dental products, explosives, smoke bombs, fertilizers, wastewater treatment, energy storage materials, and solid rocket propellants.