sodium bisulfite

noun
variants: less commonly

sodium acid sulfite

Definition of sodium bisulfite

  1. :  either of two salts usually obtained by passing sulfur dioxide through a solution of sodium carbonate: a :  an unstable crystalline salt NaHSO3 that is known especially in solution and forms sodium metabisulfite on dehydration; sodium hydrogen sulfite b :  sodium metabisulfite

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