Benzene-1,2-diol

Benzene-1,2-diol is an organic compound with the molecular formula C6H6O2 and CAS number 120-80-9. Also known as catechol or pyrocatechol, it consists of a benzene ring with two adjacent hydroxyl groups. With a molecular weight of 110.11 g/mol, this aromatic diol appears as white crystals that darken upon exposure to air and light. It is classified as a dangerous substance due to its carcinogenic, mutagenic, and toxic properties.

Benzene-1,2-diol is a white crystalline solid at room temperature that tends to darken when exposed to air and light due to oxidation. It has a melting point of approximately 105°C and is highly soluble in water, alcohol, and ether. The compound exhibits a characteristic phenolic odor and is sensitive to oxidation. Its aromatic structure with two hydroxyl groups makes it a strong reducing agent and highly reactive towards various chemical reagents.

Benzene-1,2-diol serves as an important intermediate in chemical synthesis, particularly in the production of pesticides, pharmaceuticals, and antioxidants. It is used in the manufacture of various industrial compounds including flavoring agents, photographic developers, and rubber antioxidants. The compound also finds applications in the synthesis of specialty chemicals and serves as a precursor for other catechol derivatives used in industrial processes.

Benzene-1,2-diol requires careful handling due to its carcinogenic and mutagenic properties. Personal protective equipment must include chemical-resistant gloves, safety goggles, and respiratory protection when handling powders or in poorly ventilated areas. Work should be conducted in well-ventilated areas or under fume hoods. Avoid skin and eye contact, inhalation, and ingestion. Emergency washing facilities should be readily available, and all handling procedures should follow strict safety protocols.

Benzene-1,2-diol should be stored in tightly sealed containers in a cool, dry, and dark place to prevent oxidation and discoloration. The storage area must be well-ventilated and away from heat sources, oxidizing agents, and incompatible materials. Containers should be made of suitable materials and properly labeled according to GHS requirements. Access should be restricted to authorized personnel only, and storage conditions should comply with local safety regulations for carcinogenic substances.

In case of skin contact with benzene-1,2-diol, immediately remove contaminated clothing and wash the affected area thoroughly with soap and water for at least 15 minutes. For eye contact, flush immediately with clean water for at least 15 minutes and seek medical attention. If inhaled, move the person to fresh air and monitor breathing. If ingested, do not induce vomiting and seek immediate medical attention. Always consult a physician after any significant exposure.

Benzene-1,2-diol must be disposed of as hazardous waste according to local and national regulations due to its carcinogenic properties. It cannot be disposed of in regular waste streams or poured down drains. Contact licensed hazardous waste disposal companies for proper collection and treatment. Containers must be properly labeled and documented for waste tracking. Disposal methods typically involve high-temperature incineration at authorized facilities equipped to handle toxic and carcinogenic substances.

Benzene-1,2-diol is classified under ADR as Class 6.1 (toxic substances), Packing Group III, requiring specific packaging and labeling for transport. Packages must bear appropriate hazard labels including GHS06 and GHS08 pictograms with the signal word 'Danger'. Transportation documents must include proper shipping names and hazard identification numbers. Only certified carriers experienced in handling toxic chemicals should transport this substance, following all applicable dangerous goods regulations.

Benzene-1,2-diol is subject to stringent regulations under REACH and CLP due to its classification as carcinogenic (Category 1B) and mutagenic (Category 2). It requires safety data sheets, hazard communication, and specific risk management measures. While not currently listed as a Substance of Very High Concern (SVHC), its dangerous properties require compliance with occupational exposure limits and worker protection regulations. Users must implement appropriate risk management measures and ensure regulatory compliance.

Benzene-1,2-diol is available through OYSI, a specialized European distributor of chemical products. As an established supplier, OYSI provides this regulated substance to qualified industrial customers with proper documentation and safety data sheets. Due to the substance's hazardous classification, purchases typically require verification of intended use and appropriate handling capabilities. Contact OYSI directly for availability, specifications, and regulatory compliance documentation required for your specific application and location.