Sodium nitrite manufacturers introduce to you what is sodium nitrite?

Sodium nitrite (NaNO2) is an inorganic salt formed by the combination of nitrite ion and sodium ion. Sodium nitrite is easy to deliquesce, soluble in water and liquid ammonia, and its aqueous solution is alkaline, slightly soluble in organic solvents such as ethanol, methanol and ether. Sodium nitrite has a salty taste and is sometimes used to make fake table salt. Sodium nitrite will react with oxygen to form sodium nitrate when exposed to air. If heated to above 320 ℃, it will decompose to produce oxygen, nitrogen oxide and sodium oxide. Contact with organic matter is easy to burn and explode.

White to light yellow granular, stick or powder. Hygroscopic. Decompose when heated to above 320 ℃. Slowly oxidized to sodium nitrate in the air. In case of weak acid, red-brown nitrous oxide gas is liberated and quickly decomposed into colorless nitrous oxide gas and brown-red nitrous oxide gas (it is not easy to decompose under low temperature and nitrous oxide is blue liquid) It is soluble in 1.5 parts of cold water and 0.6 parts of boiling water, slightly soluble in ethanol, and the aqueous solution is alkaline. The relative density is 2.17. Melting point 271 ℃. It is oxidizing and can burn and explode in contact with organic matter, and emit toxic and irritating nitrogen peroxide and nitrogen oxide gas. Moderately toxic, LD50 (rat, oral) 180mg / kg.

It is a strong oxidant and has reducibility. It will gradually oxidize in the air, and the surface will become sodium nitrate, which can also be oxidized by the oxidant; it will liberate brown nitrogen dioxide gas in case of weak acid; contact with organic matter and reducing agent can cause explosion or combustion And emit toxic and irritating nitrogen oxide gas; it can also be oxidized in case of strong oxidants, especially ammonium salts, such as ammonium nitrate, ammonium persulfate, etc. can interact with each other to generate high heat at normal temperature, causing combustibles to burn.

Sodium nitrite is toxic. There are rumors that sodium nitrite is a carcinogen, but in fact sodium nitrite is not a carcinogen. What is carcinogenic is nitrosamine produced by sodium nitrite under certain conditions. In the sodium nitrite molecule, nitrogen The valence of is +3. It is an intermediate compound state, which has both reducing and oxidizing properties. For example, it can oxidize KI into elemental iodine in an acidic solution.

Chromatography analysis. Spot analysis is used to determine mercury, potassium and chlorate. Diazotization reagent. Nitrosification reagents. Soil analysis. Serum bilirubin was measured in liver function test.

Bleaching agent for silk and linen, metal heat treatment agent; corrosion inhibitor for steel products; antidote for cyanide poisoning, laboratory analysis reagent, used as coloring agent, antimicrobial agent, preservative in the processing of meat products. It has applications in bleaching, electroplating and metal treatment, and is called industrial salt.