- a crystalline, water-soluble compound, NaNO3, that occurs naturally as soda niter: used in fertilizers, explosives, and glass, and as a color fixative in processed meats.
- a white crystalline soluble solid compound occurring naturally as Chile saltpetre and caliche and used in matches, explosives, and rocket propellants, as a fertilizer, and as a curing salt for preserving food such as bacon, ham, and cheese (E251). Formula: NaNO 3
