what is sodium bisulfite used for
Product Uses. Sodium bisulfite solution is used in many industries; for example, in the treatment of waste water, in the pulp and paper industry, in the photographic industry and in various other industries as a bleach or dechlorinator. Sodium bisulfite solution can also be used in the manufacture of other chemicals. E222 (food industry). Product Overview. Sodium bisulfite solution is a variously colored liquid at room temperature. It is used in waste water treatment, in the pulp and paper industry, in the photographic industry and in various other industries as a bleach or dechlorinator.