The chemical Sodium nitrite has a designated molecular formula of NNaO2 and a molecular weight of 68.995 g/mol. Synonyms may include: Anti-rust, Azotyn sodowy [Polish], Caswell No. 782, CCRIS 559, Diazotizing salts, Dusitan sodny [Czech], EINECS 231-555-9, EPA Pesticide Chemical Code 076204, Erinitrit, Filmerine, HSDB 757, Natrium nitrit [German] (ChemID).