Sodium metabisulfite is an inorganic compound of chemical formula Na 2 S 2 O 5. The substance is sometimes referred to as disodium metabisulfite. It is used as a disinfectant, antioxidant, and preservative agent.

Uses and Safety

Sodium metabisulfite (SMBS), one of the sulfites that can be used as a preservative, antioxidant and bleaching agent in food with an approved ingredient in Australia and New Zealand with the code number 223. It is a reducing agent that commonly used for the preservation of fresh & dried fruits, vegetables and wines.