1.0 2010-04-08 22:10:41 UTC 2018-05-29 01:04:51 UTC FDB013391 Sulfurous acid Food additive listed on the EAFUS Food Additive Database (Jan. 2001) Sulfurous acid (not to be confused with Sulfuric acid) is the chemical compound with the formula H2SO3. There is no evidence that sulfurous acid exists in solution, but the molecule has been detected in the gas phase. The conjugate bases of this elusive acid are, however, common anions, bisulfite (or hydrogensulfite) and sulfite. Aqueous solutions of sulfur dioxide, which sometimes are referred to as sulfurous acid are used as reducing agents and as disinfectants, as are solutions of bisulfite and sulfite salts. They are also mild bleaches, and are used for materials which may be damaged by chlorine-containing bleaches. [SO(OH)2] Acide sulfureux Acide sulphureux Acido sulfuroso Acido sulphuroso H2SO3 S(O)(OH)2 Schweflige saeure Sulfite Sulfur dioxide solution Sulfuric(IV) acid (H2SO3) Sulphurous acid H2O3S 82.079 81.97246462 sulfurous acid sulfurous acid 7782-99-2 OS(O)=O InChI=1S/H2O3S/c1-4(2)3/h(H2,1,2,3) LSNNMFCWUKXFEE-UHFFFAOYSA-N belongs to the class of inorganic compounds known as non-metal sulfites. These are inorganic non-metallic compounds containing a sulfite as its largest oxoanion. Non-metal sulfites Inorganic compounds Homogeneous non-metal compounds Non-metal oxoanionic compounds Non-metal sulfites Inorganic oxides Inorganic oxide Non-metal sulfite a small molecule sulfur oxoacid Gas logp -1.2 ChemAxon pka_strongest_acidic 1.7 ChemAxon iupac sulfurous acid ChemAxon average_mass 82.079 ChemAxon mono_mass 81.97246462 ChemAxon smiles OS(O)=O ChemAxon formula H2O3S ChemAxon inchi InChI=1S/H2O3S/c1-4(2)3/h(H2,1,2,3) ChemAxon inchikey LSNNMFCWUKXFEE-UHFFFAOYSA-N ChemAxon polar_surface_area 57.53 ChemAxon refractivity 12.33 ChemAxon polarizability 5.76 ChemAxon rotatable_bond_count 0 ChemAxon acceptor_count 3 ChemAxon donor_count 2 ChemAxon physiological_charge -1 ChemAxon formal_charge 0 ChemAxon Specdb::MsIr 338 Specdb::MsIr 339 Specdb::MsIr 340 Specdb::CMs 9618 Specdb::CMs 171217 Specdb::MsMs 23546 Specdb::MsMs 23547 Specdb::MsMs 23548 Specdb::MsMs 30344 Specdb::MsMs 30345 Specdb::MsMs 30346 Specdb::MsMs 1218074 Specdb::MsMs 1218075 Specdb::MsMs 1218076 Specdb::MsMs 2784079 Specdb::MsMs 2784080 Specdb::MsMs 2784081 Specdb::MsMs 2920975 Specdb::MsMs 2920976 Specdb::MsMs 2920977 HMDB34829 48854 #<Reference:0x000055ce32420b98> Anatidae Type 1 specific Anatidae 8830 Beefalo Type 1 specific Bos taurus X Bison bison 297284 Bison Type 1 specific Bison bison 9901 Buffalo Type 1 specific Bubalus bubalis 89462 Cattle (Beef, Veal) Type 1 specific Bos taurus 9913 Chicken Type 1 specific Gallus gallus 9031 Columbidae (Dove, Pigeon) Type 1 specific Columbidae 8930 Deer Type 1 specific Cervidae 9850 Domestic goat Type 1 specific Capra aegagrus hircus 9925 Domestic pig Type 1 specific Sus scrofa domestica 9825 Elk Type 1 specific Cervus canadensis 1574408 Emu Type 1 specific Dromaius novaehollandiae 8790 European rabbit Type 1 specific Oryctolagus 9984 Greylag goose Type 1 specific Anser anser 8843 Guinea hen Type 1 specific Numida meleagris 8996 Horse Type 1 specific Equus caballus 9796 Mallard duck Type 1 specific Anas platyrhynchos 8839 Mountain hare Type 1 specific Lepus timidus 62621 Mule deer Type 1 specific Odocoileus 9871 Ostrich Type 1 specific Struthio camelus 8801 Pheasant Type 1 specific Phasianus colchicus 9054 Quail Type 1 specific Phasianidae 9005 Rabbit Type 1 specific Leporidae 9979 Rock ptarmigan Type 1 specific Lagopus muta 64668 Sheep (Mutton, Lamb) Type 1 specific Ovis aries 9940 Squab Type 1 specific Columba 8931 Turkey Type 1 specific Meleagris gallopavo 9103 Velvet duck Type 1 specific Melanitta fusca 371864 Wild boar Type 1 specific Sus scrofa 9823 3-mercaptopyruvate sulfurtransferase P25325 MPST