• To control melanosis (black and brown spots) in shrimp
• For fermentation in the wine industry
• as an antichlor in the chemical industry
• As a redox catalyst in the acrylic fibre industry
• As a preservative in the fruit, starch and food industry
• For bleaching wool, jute and wood
• As a reducing agent in the purification of aldehydes and ketones
• In the manufacture of sulphonated oil and resin
• For detoxification of cyanide in gold ore processing plants