Sodium is a hydrosulphite (sodium of дитионит, sodium is a bisulfite, sodium of гиподисульфит, sodium of дитионистокислый) 2831100000
Sodium hydrosulfite is a white crystalline powder, readily soluble in water.
Colorless crystals, readily soluble in water, forms a crystalline hydrate. The solution is neutral. It dissolves in ethanol, poorly dissolves in liquid ammonia.
It is used as a reducing agent in the application of Ni, Co, Sn coatings on metals and plastics, an antioxidant (prevents discoloration of alkyd resins during their production), a PVC and polyurethane stabilizer, reagent for photometric determination of As (III) and Sb (III), etc.