Saltpeter (disambiguation)

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Saltpeter or saltpetre collectively refers to several nitrogen-based compounds and minerals:

  • Potassium nitrate (KNO3), the critical oxidizing component of gunpowder, and a food preservative
    • niter, the mineral form of potassium nitrate
  • Sodium nitrate (Peru saltpeter or Chile saltpeter), a component of fertilizers, explosives and solid rocket propellants; also a food preservative
    • Nitratine, the mineral form of sodium nitrate
  • Calcium nitrate ("Norway salpeter", "Norges salpeter" or "nitrate of lime"), a compound produced in Norway by the Birkeland–Eyde process during early 20th century
  • Magnesium nitrate, a hygroscopic salt with the formula Mg(NO3)2
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