Sodium metabisulfite  is an inorganic compound frequently used as a disinfectant, antioxidant and preservative agent.  It is used as a cleaning agent for potable water reverse osmosis membranes in desalination systems. It is also used to remove chloramine from drinking water after treatment.

Also used in printing and dyeing and dechlorination of  textile after bleaching , sulphonated agent and reducer of chemical industry and pharmacy.  Bleach of paper pulp,bamboo and timber bleach of stapk treatment agent of waste water , rubber solidifying agent , perfume industry is served as hydrocarbon perfume aldehyde.