Introduction Name:Sodium Nitrite CAS No:7632-00-0 UN No.:1500 Formula:NaNO2 Apperance:Pale Yellow Crystal Assay:99% Application As a concrete admixture,NaNO2 Sodium Nitrite Crystal can play three roles: 1.As an early strength agent,improve the early strength of concrete. 2.As a rust inhibitor,to prevent steel corrosion. 3.As antifreeze,to prevent winter construction concrete from freezing damage. However,sodium nitrite is a sodium salt that can carry a large amount of sodium ions into concrete,which has the risk of causing alkali aggregate reactions and should not be used in concrete for important structures.In addition,sodium nitrite is relatively toxic and needs special care when used.