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Potassium Nitrate - Saltpeter
The chemical compound potassium nitrate is a naturally occurring mineral source of nitrogen. It is an ionic salt of potassium, K+ and nitrate ions, NO3- with chemical formula KNO3.
Its common names include saltpetre (from Medieval Latin sal petrae: "stone salt" or possibly "salt of Petra"), American English saltpeter, Chilean saltpetre, Nitrate of potash and nitre. The name saltpeter is also applied to sodium nitrate.
Potassium nitrate is one of the most used chemicals in fireworks. It is the oxidizing (oxygen-supplying) component of black powder which is the base for many pyrotechnic formulations. Including rocket propellant in black powder or mixed with sugar to make "rocket candy." It can also be used to make white smoke bombs when mixed with sugar, it produces clouds of white smoke 600 times the original volume of the saltpeter and sugar mix.
Potassium nitrate is commonly used as a fertilizer as it supplies both nitrogen and potassium, two macronutrients for plants. In the process of food preservation, potassium nitrate is a common ingredient of salted meats such as cured salami and corned beef.
Potassium Nitrate can also be used as a safe stump remover. Just drill some holes in the top of the stump and fill each hole with 3-4 ounces of potassium nitrate and top with water. The potassium nitrate speeds up the decomposition of the stump. In 4-6 weeks your stump should be decayed enough to easily dig out of the ground.
Buy potassium nitrate below in powdered, granular and prilled form.