Sodium nitrite is an inorganic salt formed by the ionization and formation of nitrite ion and sodium. It is easy to deliquesce and soluble in water and liquid ammonia. Its aqueous solution is alkaline with pH of about 9 and slightly soluble in organic solvents such as ethanol, methanol and ether. This product has a salty taste and is often used to make fake table salt. It will react with oxygen when exposed to air to form sodium nitrate. If heated to Above 320 ℃, it decomposes to form oxygen, nitrogen oxide and sodium oxide. Contact with organic matter is easy to burn and explode. Because of its salty taste and low price, sodium nitrite powder is often used as an unreasonable substitute for salt in the production of illegal food. Because sodium nitrite powder is toxic, food containing industrial salt is very harmful to human body and carcinogenic.