Description

Sodium metabisulfite is a strong reducing agent that can react with oxidizing agents as the sulfur atom in it with a positive valence of 4, the maximum valence of which is 6. That is the mechanism why sodium metabisulfite is a multifunctional ingredient that can be used as a preservative, antioxidant and bleaching agent in agricultural food products, wine and other applications.

Industrial

Industrial grade sodium metabisulfite is used in a wide range of applications:

• Pharmaceuticals: used for the purification of chloroform, phenyl propyl sulfone and benzaldehyde.
• Rubber: a coagulant.
• Printing and dyeing:  as a dechlorination agent for bleached cotton.
• Leather: impart leather the properties of soft, waterproof, folding resistance in leather treatment.
• Surfactants and polymerization: as a sulfonating agent and reducing agent.
• Gold refining: as a reducing agent to precipitate gold out of an aqua regia solution by reducing the Au³⁺ to Au.