CAS: 16731-55-8 Molecular Formula: K2O5S2 Molecular Weight (g/mol): 222.31 MDL Number: MFCD00167605 InChI Key: RWPGFSMJFRPDDP-UHFFFAOYSA-L Synonym: potassium metabisulfite,potassium disulfite,potassium pyrosulfite,dipotassium disulfite,dipotassium pyrosulfite,dipotassium metabisulfite,dipotassium disulphite,unii-65oe787q7w,ccris 1427,potassium disulfite k2s2o5 PubChem CID: 28019 IUPAC Name: dipotassium sulfinatosulfonate SMILES: [K+].[K+].[O-]S(=O)S([O-])(=O)=O