Thiourea dioxide

Thiourea dioxide (also known as formamidine sulfinic acid or FAS) is a chemical compound with the molecular formula (NH2)2CSO2. It is a white crystalline powder that is soluble in water and insoluble in organic solvents. Thiourea dioxide is primarily used as a reducing agent in various industrial applications.

History

Thiourea dioxide was first synthesized in the late 19th century. The compound was initially used in the textile industry for its reducing properties, which allowed for the creation of new dyeing techniques.

Production

The production of thiourea dioxide involves the reaction of thiourea with hydrogen peroxide in an acidic medium. This reaction produces thiourea dioxide and water.

Uses

Thiourea dioxide is widely used in the textile industry as a reducing agent in the dyeing process. It is also used in the paper industry for bleaching pulp and in the photographic industry for developing black and white film. In addition, thiourea dioxide is used in the production of resins and plastics.

Safety

Thiourea dioxide is considered a hazardous substance. It can cause irritation to the skin, eyes, and respiratory tract. Prolonged exposure can lead to serious health problems, including damage to the liver and kidneys.

Environmental Impact

Thiourea dioxide is a persistent organic pollutant. It can have a negative impact on aquatic life and can contaminate groundwater if not properly disposed of.

See Also

• Thiourea
• Reducing agent
• Textile industry
• Paper industry
• Photographic industry