Sodium nitrate is the chemical compound with the formula NaNO3. This salt, also known as "Chile saltpeter" or "Peru saltpeter"

Sodium nitrate is used as an ingredient in  fertilizers, pyrotechnics, as a food preservative, and as a solid rocket propellant, as well as in glass and pottery enamels; the compound has been mined extensively for those purposes.

Sodium nitrate is also synthesized industrially by neutralizing nitric acid with soda ash.

sodium nitrate