Potassium metabisulfite 1.CAS: 16731-55-8 2. White crystal or ... /kgmax Application:Used in bleaching agent, antiseptic, antioxidant, the preservation of wine, beer, fruit juice, vegetable, meat and grape, or used ... photo chemicals. It also can be used in cyanideless electroplating of silver. Potassium Metabisulfite