1.0 2010-04-08 22:11:50 UTC 2025-11-19 00:54:58 UTC FDB015420 Sodium hydrogen sulfite It is used in food processing as sanitising agent for food containers and fermentation equipment, preservative to reduce or prevent microbial spoilage, selective inhibitor of undesirable microorganisms in the fermentation industries, and as an antioxidant and inhibitor of enzyme-catalysed oxidative discoloration and non-enzymic browning Sodium bisulfite (sodium hydrogen sulfite) is a chemical compound with the chemical formula NaHSO3. Sodium bisulfite is a food additive with E number E222. This salt of bisulfite can be prepared by bubbling sulfur dioxide in a solution of sodium carbonate in water. Sodium bisulfite in contact with chlorine bleach (aqueous solution of sodium hypochlorite) will release harmful fumes. E222 Hydrogen sodium sulfate Hydrogen sodium sulfite Monosodium sulfite Sodium acid sulfite Sodium bisulfite Sodium bisulfite (1:1) Sodium bisulfite (NaHSO3) Sodium sulfite (NaHSO3) Sulfurous acid, monosodium salt, 8CI HNaO3S 104.061 103.954409263 sodium hydrogen sulfite sodium bisulfite 7631-90-5 [Na+].OS([O-])=O InChI=1S/Na.H2O3S/c;1-4(2)3/h;(H2,1,2,3)/q+1;/p-1 DWAQJAXMDSEUJJ-UHFFFAOYSA-M belongs to the class of inorganic compounds known as alkali metal sulfites. These are inorganic compounds in which the largest oxoanion is sulfite, and in which the heaviest atom not in an oxoanion is an alkali metal. Alkali metal sulfites Inorganic compounds Mixed metal/non-metal compounds Alkali metal oxoanionic compounds Alkali metal sulfites Inorganic oxides Inorganic sodium salts Alkali metal sulfite Inorganic oxide Inorganic salt Inorganic sodium salt inorganic sodium salt sulfite salt melting_point 150 °C, 423 K, 302 °F logp -1.2 ChemAxon pka_strongest_acidic -3.7 ChemAxon iupac sodium hydrogen sulfite ChemAxon average_mass 104.061 ChemAxon mono_mass 103.954409263 ChemAxon smiles [Na+].OS([O-])=O ChemAxon formula HNaO3S ChemAxon inchi InChI=1S/Na.H2O3S/c;1-4(2)3/h;(H2,1,2,3)/q+1;/p-1 ChemAxon inchikey DWAQJAXMDSEUJJ-UHFFFAOYSA-M ChemAxon polar_surface_area 60.36 ChemAxon refractivity 11.21 ChemAxon polarizability 5.43 ChemAxon rotatable_bond_count 0 ChemAxon acceptor_count 3 ChemAxon donor_count 1 ChemAxon physiological_charge -1 ChemAxon formal_charge 0 ChemAxon Specdb::MsMs 1255987 Specdb::MsMs 1255988 Specdb::MsMs 1255989 Specdb::MsMs 1371175 Specdb::MsMs 1371176 Specdb::MsMs 1371177 26709