Thiourea

Thiourea is an organic sulfur-containing compound with the molecular formula CH4N2S and CAS number 62-56-6. This crystalline substance has a molecular weight of 76.12 g/mol and belongs to the family of thiocarbamide compounds. It is classified as a hazardous chemical with carcinogenic and reproductive toxicity properties, requiring careful handling in industrial and laboratory applications.

Thiourea is a white crystalline solid at room temperature with high water solubility. It has a molecular mass of 76.12 g/mol and contains sulfur, nitrogen, and carbon atoms in its structure. The compound is stable under normal conditions but can decompose when heated. It exhibits good solubility in polar solvents, making it useful for various chemical processes and reactions.

Thiourea is primarily used in pharmaceutical synthesis, rubber vulcanization accelerators, and photographic processing. It serves as an intermediate in the production of various chemicals and pharmaceuticals. The compound is also utilized in analytical chemistry as a reagent, in textile processing, and in certain metal extraction processes. Its unique chemical properties make it valuable for specialized industrial applications.

Thiourea requires strict safety measures due to its carcinogenic and reproductive toxicity properties (Carc. 2; Repr. 2). Use appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and respiratory protection. Work in well-ventilated areas or under fume hoods. Avoid skin contact, inhalation, and ingestion. Follow proper hygiene practices and wash hands thoroughly after handling.

Thiourea should be stored in a cool, dry, well-ventilated area away from heat sources and incompatible materials. Keep containers tightly closed and properly labeled according to GHS requirements. Store separately from oxidizing agents and acids to prevent dangerous reactions. Ensure storage areas have appropriate containment measures and access restrictions due to the substance's hazardous classification.

Thiourea exposure requires immediate action due to its acute toxicity (Acute Tox. 4). For skin contact, remove contaminated clothing and rinse thoroughly with water for at least 15 minutes. If inhaled, move to fresh air immediately. In case of eye contact, flush with water for 15 minutes. For ingestion, do not induce vomiting and seek immediate medical attention. Always consult safety data sheets for complete first aid procedures.

Thiourea disposal must comply with local and national hazardous waste regulations due to its classification as carcinogenic and environmentally hazardous (Aquatic Chronic 2). Contact licensed waste disposal companies for proper treatment and disposal. Do not discharge into drains, soil, or water bodies. Collect waste in appropriate containers, properly labeled, and maintain disposal documentation as required by environmental authorities.

Thiourea is classified as ADR Class 9 (miscellaneous dangerous goods), Packing Group III for transportation. This classification requires specific packaging, labeling, and documentation according to dangerous goods regulations. Use UN-approved packaging and ensure proper hazard labels are displayed. Transport vehicles must comply with ADR requirements, and drivers need appropriate training for handling Class 9 substances.

Thiourea is subject to comprehensive chemical regulations including REACH registration and CLP classification requirements in Europe. Its classification as Carc. 2 and Repr. 2 means it faces restrictions under various occupational health and safety regulations. Users must comply with workplace exposure limits, risk assessment requirements, and may need authorization for certain uses. Importers and manufacturers must fulfill REACH obligations.

Thiourea is available through OYSI, a European distributor of technical chemicals. As a specialized chemical distributor, OYSI can provide thiourea with proper documentation, safety data sheets, and regulatory compliance support. Given the substance's hazardous classification, purchasing from experienced chemical distributors ensures proper handling, packaging, and regulatory compliance throughout the supply chain in European markets.