Sodium Metabisulphite Sodium Metabisulphite Applications of Sodium Metabisulphite Water Treatment: Used for dechlorination and removing residual chlorine from treated water. Textile Industry: Used as a reducing agent in textile processing and dyeing. Paper & Pulp Industry: Used in bleaching and chemical processing. Mining Industry: Used in mineral processing and flotation applications. Food Industry: Used as a preservative and antioxidant where permitted by applicable regulations. Industrial Processing: Used as a reducing agent in various chemical processes.