Sodium Metabisulfite, also called Sodium Pyrosulfite or Disodium, is an inorganic compound composed of sodium, sulfur and oxygen. Its chemical formula is Na2S2O5. It typically comes in a white or yellowish-white crystalline powder. It easily dissolves in water. The substance is sometimes referred to as disodium (metabisulfite). It is used as a disinfectant,antioxidant and preservative agent.
