Description

Thiourea Dioxide is a powerful and versatile reducing agent, also known as formamidine sulfinic acid. Its unique chemical properties make it a critical component in industrial processes where a stable, non-toxic, and highly effective reductant is required. This compound is essential for manufacturers in the textile, paper, and polymer industries seeking efficient and environmentally favorable processing solutions.

Application

• Textile Bleaching & Stripping: Primary use as a reducing bleach for wool, silk, and synthetic fibers, offering excellent color preservation and fiber protection.
• Paper & Pulp Industry: Used as a bleaching agent for mechanical pulp and a deinking agent in paper recycling processes.
• Polymer & Plastics: Acts as a reducing agent and blowing agent precursor in the production of foamed plastics and certain specialty polymers.
• Chemical Synthesis: Serves as a selective reducing agent in organic synthesis for the reduction of peroxides, disulfides, and quinones.
• Photographic Industry: Employed in photographic developing solutions as a stabilizing and reducing agent.
• Water Treatment: Used in specific applications for the reduction of heavy metals and chlorine from wastewater.

Basic Information

Product Name	Thiourea Dioxide
CAS No.	4189-44-0
Molecular Formula	CH4N2O2S
Molecular Weight	108.12 g/mol
Synonyms	Formamidine Sulfinic Acid; Amino(imino)methanesulfinic Acid; Thiourea S,S-Dioxide; TDO; FAS; Reductone; Reducing Agent FM
EINECS	224-049-7

Quality Control

Our Thiourea Dioxide is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Each lot is tested against comprehensive specifications, including assay, moisture content, and solubility. A Certificate of Analysis (COA) documenting all test results is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area. Due to its hygroscopic nature, the container must be kept tightly sealed after each use to prevent moisture absorption and degradation. Recommended storage temperature is between 15°C and 25°C.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (Titration)	≥ 98.0 %
Loss on Drying	≤ 0.5 %
Solubility (in water)	Clear, colorless solution
pH (1% solution)	4.0 - 6.0

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.