... it from ordinary saltpeter, potassium nitrate, is a white solid which is very soluble in water. The mineral form is ... smoke bombs, as a food preservative, and as a solid rocket propellant, as well as in glass and pottery ... compound has been mined extensively for those purposes. Sodium nitrateIUPAC name[hide]Sodium nitrateOther names[hide]CalicheChile saltpeterNitrate of sodaNitratinePeru saltpeterSoda ...