Also known as: Formamidine sulfinic acid (FAS)
Chemical Formula: CHNOS
CAS No.: 1758-73-2
Molecular Weight: 108.12 g/mol
Thiourea dioxide (TUD) is a white crystalline powder used primarily as a reducing agent in textile processing, paper bleaching, and organic synthesis. It is odorless, water-soluble, and exhibits strong reducing properties under alkaline conditions.
| Parameter | Specification |
|---|---|
| Appearance | White crystalline powder |
| Purity | 99.0 % |
| Moisture | 0.5 % |
| Insoluble Matter | 0.1 % |
| pH (1% solution) | 4.0 6.0 |
| Sulfate (SO) | 0.1 % |
| Heavy Metals | 10 ppm |
| Iron (Fe) | 10 ppm |
(Values may vary slightly by manufacturer grade.)
| Property | Value |
|---|---|
| Density | ~1.4 g/cm |
| Solubility | Soluble in water (moderate) |
| Decomposition Temp. | > 100C (decomposes) |
| Stability | Stable under dry conditions |
| Reducing Strength | Strong in alkaline medium |
Textile dyeing and stripping agent
Textile vat dye reduction
Paper pulp bleaching
Photographic chemicals
Polymerization inhibitor
Organic synthesis intermediate
25 kg woven polypropylene bags with inner liner
500 kg / 1000 kg jumbo bags
Custom packaging available
Store in cool, dry, well-ventilated area
Avoid moisture and high temperature
Use protective gloves and goggles
Avoid inhalation of dust
Refer to SDS before handling
UN Classification: Not classified as dangerous goods under most transport regulations (confirm per region).
12 months under recommended storage conditions
Keep container tightly closed

Price:
Price 519.20 INR / Pack
Minimum Order Quantity : 5 Packs
Application : Industrial
Grade : Industrial Grade
Purity : 99 %
Shelf Life : Up to 12 Months
Price 430 INR / Kilograms
Minimum Order Quantity : 50 Kilograms
Application : Industrial
Grade : Industrial Grade
Purity : 99 %
Shelf Life : Up to 12 Months
Price 1700 INR / Kilograms
Minimum Order Quantity : 20 Kilograms
Application : Industrial
Grade : Industrial Grade
Purity : 99 %
Shelf Life : Up to 12 Months
Price 65 INR / Kilograms
Minimum Order Quantity : 500 Kilograms
Application : Industrial
Grade : Food Grade
Purity : 99 %
Shelf Life : Up to 12 Months