[{"from": "human", "value": "Please give me some details about this molecule. [O][S][=Branch1][C][=O][O-1].[Na+1]"}, {"from": "gpt", "value": "The molecule is an inorganic sodium salt having hydrogensulfite as the counterion. It has a role as a mutagen and an allergen. It is an inorganic sodium salt and a sulfite salt. It contains a hydrogensulfite."}]