Sodium nitrate, chemical English name: sodiumnitrate Chinese name 2: Chilean nitrate, hazard category: route of invasion: health hazard: irritating to the skin and mucous membranes. Patients with oral poisoning develop severe abdominal pain, vomiting, stool, shock, convulsions, coma and even death. So be very careful!
Sodium nitrate definition:
Sodium nitrate is an inorganic salt chemically formulated as NaNO3, a white solid powder also known as Chilean saltpeter or Peruvian saltpeter (less common). The world's largest sodium nitrate mine is located in Chile's Atacama Desert. Synthesis can be achieved by the following chemical formula: NaOH(aq)+HNO3(aq)→NaNO3(aq)+H2O(l)
Sodium nitrate is heated to 380 °C and decomposed to produce sodium nitrite and oxygen. Sodium nitrate is oxidizing and can react with lead to form sodium nitrite and lead oxide. Hydrogen iodate is also oxidized to an iodine substance at room temperature, forming nitric oxide: the introduction of hydrogen ions into the sodium nitrate solution will show the properties of nitric acid: sodium nitrate is one of the components of salt.
Chemical Properties:
When dissolved in water, it absorbs heat. Decomposes into sodium nitrite and oxygen when heated to above 380 °C, releases nitrogen and oxygen when heated to 400-600 °C, releases nitric oxide when heated to 700 °C, and generates a small amount of nitrogen dioxide and nitrous oxide. Heat to 775~865°C. Together with sulfuric acid, nitric acid and sodium bisulfate are formed. Salt can trigger complex decomposition. It is an oxidizing agent. Contact with organic matter such as sawdust, wood chips and oil can cause combustion and explosion.
Uses of sodium nitrate:
1. The enamel industry is used as a flux, oxidant and raw material for the preparation of enamel powder. In the glass industry, it is used as a decolorizing agent, defoamer, clarifier and oxidative flux for various glass and products. The inorganic industry is used as a decolorizer for melting caustic soda and the production of other nitrates. The food industry acts as a colorant in meat processing, preventing meat from spoiling and playing a flavoring role. The fertilizer industry is suitable for acidic soils, especially for root crops such as sugar beets and radishes. The dye industry is used as a raw material for the production of picric acids and dyes. It is used as steel in the metallurgical industry and aluminum alloy as a heat treatment agent. Machine City Industrial is used as a metal cleaner and a blue agent on black metal. The pharmaceutical industry uses penicillin as a culture medium. The cigarette industry uses tobacco as an accelerator. Used as a chemical reagent in analytical chemistry. In addition, it is also used in the production of explosives, etc.
2. Chemically pure sodium nitrate is used in the low chromic acid passivation solution of the galvanized layer and the oxidation solution of the magnesium alloy.
Sodium nitrate properties:
Physical properties: colorless transparent or white slightly with yellow diamond crystals, slightly bitter taste, addictive. When dissolved in water, the temperature of the solution decreases and the solution becomes neutral. oxidation. Friction or impact of organic matter can cause combustion or explosion. Toxic, semi-lethal dose (rabbit, orally) 1.955 g anion / kg.
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