Sodium metabisulfite (MBS, Sodium disulfite) is an inorganic salt. It is the sodium salt of disulphurous (pyrosulfurous) acid. It is widely used in textile dyeing, photography and paper industry. It is also commonly added to various food products and wines as a preservative.
Synonyms: Sodium disulfite; Sodium pyrosulfite
Molecular Formula: Na2O5S2
Molecular Weight: 190.11
Linear Structural Formula: Na2S2O5
MDL Number: MFCD00167602
Purity: 98-100.5%
Melting Point: >300 C (lit.)
Application: Sodium metabisulfite may be used as an initiator during the cross-linking polymerization of polybutadiene in the cores of the vesicle membranes. It may be added as an antioxidant during the preparation of stock solutions of 6-hydroxydopamine in various studies.