1.0 2010-04-08 22:09:12 UTC 2025-11-18 23:20:36 UTC FDB010575 Calcium sulfite Preservative Calcium sulfite, or calcium sulphite, is a chemical compound which is the salt of calcium cation and sulfite anion with the molecular formula CaSO3. As a food additive it is used as a preservative under the E number E226. It is commonly used in preserving wine, cider, fruit juice, canned fruit and vegetables. Calcium sulphite E226 Sulfurous acid calcium salt Sulfurous Acid, Calcium Salt (1:1) CaO3S 120.141 119.919405711 calcium sulfite calcium sulfite 10257-55-3 [Ca++].[O-]S([O-])=O InChI=1S/Ca.H2O3S/c;1-4(2)3/h;(H2,1,2,3)/q+2;/p-2 GBAOBIBJACZTNA-UHFFFAOYSA-L belongs to the class of inorganic compounds known as alkaline earth 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 alkaline earth metal. Alkaline earth metal sulfites Inorganic compounds Mixed metal/non-metal compounds Alkaline earth metal oxoanionic compounds Alkaline earth metal sulfites Inorganic calcium salts Inorganic oxides Alkaline earth metal sulfite Inorganic calcium salt Inorganic oxide Inorganic salt melting_point 600 °C, 873 K, 1112 °F logp -1.2 ChemAxon pka_strongest_acidic -3.7 ChemAxon iupac calcium sulfite ChemAxon average_mass 120.141 ChemAxon mono_mass 119.919405711 ChemAxon smiles [Ca++].[O-]S([O-])=O ChemAxon formula CaO3S ChemAxon inchi InChI=1S/Ca.H2O3S/c;1-4(2)3/h;(H2,1,2,3)/q+2;/p-2 ChemAxon inchikey GBAOBIBJACZTNA-UHFFFAOYSA-L ChemAxon polar_surface_area 63.19 ChemAxon refractivity 10.08 ChemAxon polarizability 5.1 ChemAxon rotatable_bond_count 0 ChemAxon acceptor_count 3 ChemAxon donor_count 0 ChemAxon physiological_charge -1 ChemAxon formal_charge 0 ChemAxon Specdb::MsMs 1271674 Specdb::MsMs 1271675 Specdb::MsMs 1271676