Sodium nitrate is a kind of inorganic salt, chemical formula NaNO3, white solid powder, also known as Chilean saltpeter or Peruvian saltpeter (less common). The largest sodium nitrate mine in the world is located in Chile's Atacama Desert. It can be synthesized from the following chemical formula: NaOH(aq) + HNO3(aq) → NaNO3(aq) + H2O(l) sodium nitrate is heated to 380℃ and decomposed to produce sodium nitrite and oxygen. Sodium nitrate is oxidizing and can be co-heated with lead to produce sodium nitrite and lead oxide. It also oxidizes hydroiodic acid to elemental iodine and forms nitric oxide at room temperature: Introducing hydrogen ions into sodium nitrate solution will exhibit the properties of nitric acid: sodium nitrate is one of the components of curing salt.

application

Sodium nitrate is the raw material for the manufacture of potassium nitrate, mine explosive, picric acid, dye and so on. Nitrating agent for making dye intermediates. Glass industry used for the production of various glass and its products defoaming agent, decolorizing agent, clarifying agent and oxidation flux. The enamel industry is used as oxidant and flux in the preparation of enamel powder. Mechanical industry used as metal cleaning agent, also used to prepare black metal bluing agent. Metallurgical industry used as steel and aluminum alloy thermal treatment agent. Light industry is used as an accelerant in the manufacture of cigarettes. Used in the pharmaceutical industry as a medium for penicillin. The fertilizer industry is used as a quick-acting fertilizer suitable for acidic soils, especially for root crops such as beets and radishes. Also used as a decolorizing agent for molten caustic soda. High purity analytical reagents, spectral reagents, oxidants, also used in dye synthesis and explosives and fireworks manufacturing. Nitrates have early strength, especially at low temperature, negative temperature as early strength, antifreeze. Used as corrosion inhibitor and desensitization agent in toothpaste to prevent dentin allergy. Sodium nitrate is mainly used as corrosion inhibitor and boiler metal embrittlement inhibitor in the field of water treatment. In addition, there are many other areas of use. Sodium nitrate was added to the low pressure boiler system to inhibit the corrosion of metal on the water side and prevent the embrittlement of metal materials. When sodium nitrate is used as metal embrittlement inhibitor, it should be used in combination with sodium hydroxide, and maintain a certain proportion. Electroplating grade or chemically pure sodium nitrate can be used for the addition of black chromium in electroplating, but also can be used in black chromium plating electrolyte, low chromic acid passivation of zinc coating, zinc leaching, magnesium and magnesium alloy oxidation solution.

Leakage emergency treatment

Isolate the contaminated area of leakage and restrict access. Emergency personnel are advised to wear dust masks and protective suits. Do not contact the leakage directly, do not make the leakage contact with organic matter, reducing agent, flammable substance.

Small leakage: wash with a lot of water, wash water diluted into the waste water system.

Large leakage: collect and recycle or transport to waste disposal site.

• Operational disposal and storage

Operation precautions: Close the operation, enhance ventilation, operators must undergo special training, strictly follow the operation rules, it is recommended that operators wear self-priming filter dust port, chemical safety protective glasses, polyethylene respirator suit, and neoprene rubber gloves. Keep away from fire and heat sources, no smoking in the workplace, and keep away from inflammable and combustible materials. Avoid producing dust. Avoid contact with reducing agent, active metal powder, acid, handling should be lightly unloaded, to prevent packaging and container damage. Equipped with the corresponding variety and quantity of fire equipment and leakage emergency treatment equipment. An empty container may contain harmful residue.

Storage precautions; Store in a cool, ventilated warehouse. Keep away from tinder and heat source, the storage temperature shall not exceed 30℃, and the relative humidity shall not exceed 80%. It should be stored separately from reducing agent, active metal powder, acid and combustible materials, and avoid mixed storage. The storage area should be equipped with appropriate materials to absorb leakage.