Sodium Hydrosulphite

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Sodium Hydrosulphite, also known as sodium dithionite, is a white to yellowish powder with a strong reducing property. It is highly soluble in water and decomposes readily, releasing sulfur dioxide and sulfites. Widely used as a powerful reducing agent and bleaching agent, it finds applications in textile processing, paper and pulp industries, water treatment, and chemical manufacturing. Its ability to break down colored compounds makes it ideal for decolorization and cleaning processes.

Description

Uses

Primary Uses

  • Textile Industry
    • Used as a reducing agent in the vat dyeing process and for bleaching fabrics.
    • Removes excess dye and helps in color correction of textiles.
  • Paper and Pulp Industry
    • Employed in deinking recycled paper to remove inks and contaminants.
    • Acts as a bleaching agent to brighten paper products.
  • Water Treatment
    • Utilized for the removal of chlorine and chloramines from water, protecting aquatic life and equipment.
    • Reduces harmful oxidizing agents in wastewater treatment.
  • Leather Industry
    • Used in the deliming process and to bleach hides and skins during leather manufacturing.
  • Chemical Manufacturing
    • Serves as a reducing agent in the synthesis of various chemicals, including dyes and pharmaceuticals.

Secondary Uses

  • Photography
    • Used as a reducing agent in photographic developers to control image development.
  • Metal Treatment
    • Employed for removing surface oxides and scales during metal finishing and cleaning.
  • Food Industry
    • Used as a bleaching agent in some food processing applications under regulated conditions.