Thiourea Dioxide (TDO) – Industrial Reducing Agent for Textile, Paper & Fine Chemicals

Henan Langrui Chemical Co., Ltd. supplies high-quality Thiourea Dioxide (TDO), a modern and effective reducing agent widely used as an alternative to sodium hydrosulfite in textile, paper and other industrial applications. Our TDO is offered in bulk packaging for industrial customers with consistent purity and reliable logistics support.

Product Description

Thiourea Dioxide (TDO), also known as formamidine sulfinic acid, is an organosulfur reducing agent commonly supplied as a white to off-white crystalline powder. TDO exhibits strong reducing power under alkaline conditions and is valued for its efficiency in decolorisation, reduction of sulphur dyes, and other industrial reduction processes. Typical molecular information: Formula: CH₄N₂O₂S; Molar mass: ~108.12 g·mol⁻¹. :contentReference[oaicite:0]{index=0}

Applications

• As a reducing agent in textile industry — discharge printing and reduction clearing of sulphur dyes.
• Paper, pulp and board industry — decolorisation and bleaching-reduction processes.
• Leather processing — used in specific reduction and finishing operations.
• Photographic industry — specialty chemical applications and reducing baths.
• Fine chemical synthesis — intermediate for sensitizing agents, pharmaceuticals, spices and other organic syntheses.
• Macromolecule & resin industry — as a catalyst or stabilizer in certain resin productions.
• Environmental and metallurgy applications — assisting in recycling and separation of heavy metals in some processes.

These versatile uses make TDO a preferred substitute for sodium hydrosulfite where controlled, cleaner reduction is required. :contentReference[oaicite:1]{index=1}

Specifications (Typical)

• Chemical Name: Thiourea Dioxide (Formamidine Sulfinic Acid)
• CAS No.: 1758-73-2. :contentReference[oaicite:2]{index=2}
• Formula: CH₄N₂O₂S
• Molecular Weight: 108.12 g·mol⁻¹
• Appearance: White to off-white crystalline powder
• Purity: Common industrial grades ≥ 96–99% (grade-dependent)
• Moisture: ≤ 0.5% (typical specification)
• Packing: 25 kg kraft/PE bags, 50 kg drums, or jumbo bags for bulk shipments (custom packing on request).

Key Considerations for Use & Safety

Handle TDO with appropriate industrial hygiene: avoid dust formation, use protective gloves and eye protection, and ensure good ventilation. Store in a cool, dry place away from strong oxidizers and acids. Consult the product SDS/TDS for detailed handling, first-aid and transport information — Thiourea Dioxide can be hazardous under certain conditions and emergency contact procedures should be in place. :contentReference[oaicite:3]{index=3}

Conclusion

Thiourea Dioxide (TDO) is an effective, modern reducing agent with broad industrial applications in textiles, paper, leather, fine chemicals and metal recycling processes. Henan Langrui Chemical offers reliable supply, technical documentation (TDS/SDS) and bulk logistics to support your production needs — contact us for samples, technical data and pricing tailored to your application.