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Potassium nitrate refers to a chemical fertilizer containing 13.8% nitrogen and 46.6% potassium oxide. Commonly known as fire nitrate or soil nitrate. The relative molecular mass is 101.10. It is a colorless transparent orthorhombic crystal or diamond crystal or white powder. It is odorless, non-toxic, salty and cool. It absorbs moisture in the air and is not easy to agglomerate. The relative density is 2.019 (16 ° C), the melting point is 334 ° C, soluble in water, and the solubility increases rapidly with increasing temperature. It is soluble in liquid ammonia and glycerin, and insoluble in anhydrous ethanol and ether. Potassium nitrate is a non-chlorine, nitrogen and potassium compound fertilizer with high solubility. Its active constituents, nitrogen and potassium, can be quickly absorbed by crops without chemical residues. It should be applied to vegetables, fruits and flowers, as well as some chlorine-sensitive crops (such as potatoes, strawberries, beans, cabbage, lettuce, peanuts, carrots, onions, blueberries, tobacco, apricots, grapefruit and avocados). Potassium nitrate is a strong oxidant that can cause burning and explosion when in contact with organic matter. Therefore, potassium nitrate should be stored in a cool dry place, away from fire and heat. Do not store and mix with reducing agents, acids, easy (combustible), metal powder.

1. Used as analytical reagents and oxidants, also used in the synthesis of potassium salts and in the formulation of explosives.

2, used in the food industry as a coloring agent, color protectant, anti-microbial agent, preservative, such as used for cured meat, anti-corrosion in lunch meat.

3, is the manufacture of black gunpowder, such as mine gunpowder, fuse, firecrackers and other raw materials. Also used in fireworks to create a purple spark. Mechanical heat treatment as a quenching salt bath. The ceramic industry is used to make enamel color medicine. Used as a glass clarifier. Used in the manufacture of automotive lamp glass bulbs, optical glass tube glass bulbs, etc. The pharmaceutical industry is used to produce penicillin potassium salt, rifampicin. Used to make cigarette paper. Used as a catalyst. Mineral processing agent. Used as a compound fertilizer for crops and flowers.

4. Potassium nitrate is also a coloring agent allowed in China. It acts as a color protection and bacteriostasis in the meat product due to the action of bacteria to reduce to potassium nitrite. The Chinese regulations can be applied to meat products, the maximum use amount is 0.5g/kg, and the residual amount should not exceed 0.03g/kg.

5. Used in the manufacture of fireworks, matches, ceramic glazes, fertilizers, etc.

6, industrial potassium nitrate is also widely used in the tempered glass production process.