The global sodium metabisulfite market can be divided into North America, Latin America, Europe, Asia Pacific, and Middle East & Africa. Sodium metabisulfite is an inorganic compound comprising sodium, sulfur, and oxygen. It is also called sodium pyrosulfite. Its chemical formula is Na?S?O?. Sodium metabisulfite is available in the powder form either in white or yellowish-white color. It is water soluble and has a peculiar rotten egg smell. Its acidic and preservative properties make sodium metabisulfite an effective substitute for sodium bisulfite, a chemical used in traditional darkroom photography. Sodium metabisulfite is also employed as a bleaching agent in the manufacture of pulp and textiles.