scat Chemical is a world famous manufacturer, supplier, and exporter of RO chemicals. Our RXSOL-33-1524-025 Sodium Bisulphite is used as a food additive and a food preservative. It is also used in purification and decolorization processes during production of various chemicals. It has applications in wastewater treatment, in drinking water treatment, in prevention of corrosion, wine making, and DNA sequencing.