+Saltpeter, also known as [Potassium Nitrate](/wiki/potassium_nitrate), is a crystalline mineral salt found in nature. Historically, it has been a vital component in [Gunpowder](/wiki/gunpowder) and used for various purposes including fertilizer and food preservation.
+## See also
+- [Potassium](/wiki/potassium)
+- [Nitrate](/wiki/nitrate)
+- [Explosive](/wiki/explosive)
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