CAS: 7681-57-4 Molecular Formula: Na2O5S2 Molecular Weight (g/mol): 190.09 MDL Number: MFCD00167602 InChI Key: LDTLADDKFLAYJA-UHFFFAOYSA-L Synonym: sodium metabisulfite,sodium pyrosulfite,sodium disulfite,disodium pyrosulfite,sodium metabisulphite,disodium disulfite,disodium disulphite,fertisilo,disodium metabisulfite,natrii disulfis PubChem CID: 656671 IUPAC Name: disodium (sulfinatooxy)sulfinate SMILES: [Na+].[Na+].[O-]S(=O)OS([O-])=O