White or a little buff fine crystal. The relative molecular weight is 69.0 and density is 2.168. It’s no smell and a little saline taste, easy to be deliquescence and to dissolve in water. The melting point is 271℃and decomposition temperature is 320℃. It has the strong oxidizing property, as well as reducing property. It can slowly oxidize into sodium nitrite in the air, and will become diamino compound composed with ammonia under low temperature.

1. sodium nitrite is mainly used to know nitro compounds, azo dyes and other raw materials, 
2. sodium nitrite as the mordant for dyeing, bleaching agents 
3.sodium nitrite  also used as a metal heat treatment, plating corrosion inhibitors, 
4.sodium nitrite used for instrument disinfection medicine, preservatives. 
5.sodium nitrite as cement early strength agent, antifreeze, etc. 
6.sodium nitrite  in meat products used in the color development processing agent, anti-microbial agents, preservatives.