Sodium Dithionite
Sodium Hydrosulfite, "Hydro".
- CAS
- 7775-14-6
- EC
- 231-890-0
- Sectors
- Textiles, Leather & Paper, Water & Wastewater Treatment
Sodium Dithionite, also known as Sodium Hydrosulfite, is a powerful reducing agent in white crystalline powder form. It is highly reactive and valued for its oxygen-scavenging capabilities.
This Technical Grade chemical is indispensable for stripping color and bleaching heat-sensitive materials. It is unstable in the presence of air and moisture, requiring specialized stabilization for industrial use.
In chemical processing, it acts as a primary reagent for vat dyeing and heavy metal recovery. Its rapid reaction rate makes it a preferred choice for high-speed industrial bleaching lines.
SoleChem, an ISO 9001:2015 certified chemical supplier based in Türkiye, delivers Sodium Dithionite (CAS 7775-14-6) to customers in more than 40 countries.
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Sodium Dithionite
Applications
- Textile Industry: Primarily used for vat dyeing reduction and for stripping unwanted color from fabrics
- Pulp and Paper: Employed in the bleaching of mechanical pulp and the de-inking of recycled paper.
- Water Treatment: Used to reduce hexavalent chromium to trivalent chromium in industrial wastewater.
Safety & Risks
Classified as Self-Heating Substance Category 1 and Acute Toxicity 4. Must be kept dry; contact with moisture releases toxic Sulfur Dioxide gas. Wear full PPE and use dry storage.
Packaging
50 kg or 100 kg steel drums with airtight liners.