Sodium metabisulfite food additive preservative bleaching agent antioxidant Brightener crisp

The main purpose of chemical, pharmaceutical industry. Photographic industry as ingredients fixer. Perfume industry for the production of vanillin. Used as a preservative brewing industry, rubber coagulant and dechlorination agent after bleaching cotton. Organic intermediates, dyes, tanning as a reducing agent used for the electroplating industry, waste water treatment and as a mine field of processing agents. Dyeing, organic synthesis, printing, leather, and other departments for the industry; as preservatives, bleaches, sparsely agents in food processing.