Potassium Nitrate , a naturally occurring mineral source of nitrogen which makes up the critical oxidizing component of gun powder
Sodium Nitrate , an ingredient in fertilizers, explosives and in solid rocket propellants
Edwin Ernest Salpeter , a stellar astronomer who proposed the riple-alpha process for burning helium, and an initial mass function for stellar populations
Saltpeter War (1879-1884) between Chile, Peru and Bolivia
