hydrogensulfite sulfite chebi_ontology InChI=1S/H2O3S/c1-4(2)3/h(H2,1,2,3)/p-2 trioxosulfate(IV) trioxosulfate(2-) [O-]S([O-])=O O3S [SO3](2-) sulfite CAS:14265-45-3 CHEBI:15139 CHEBI:17359 CHEBI:45548 PDBeChem:SO3 79.95791 SO3 LSNNMFCWUKXFEE-UHFFFAOYSA-L sulphite -2 trioxidosulfate(2-) 80.06420 SO3(2-) Gmelin:1449 SULFITE ION A sulfur oxoanion that is the conjugate base of hydrogen sulfite (H2SO3). sulfur oxoanion sulfur oxide divalent inorganic anion