Benzo[a]pyrene

Benzo[a]pyrene is a polycyclic aromatic hydrocarbon (PAH) with the molecular formula C20H12 and CAS number 50-32-8. This compound consists of five fused benzene rings and has a molecular weight of 252.3 g/mol. It is classified as a highly hazardous substance with carcinogenic, mutagenic, and reproductive toxicity properties. Benzo[a]pyrene is commonly found as a byproduct of incomplete combustion processes and is considered one of the most potent carcinogenic PAHs.

Benzo[a]pyrene is a solid crystalline compound at room temperature, typically appearing as pale yellow crystals or powder. It has a very low water solubility but is soluble in organic solvents such as benzene, toluene, and acetone. The compound is odorless and has a high melting point around 179°C. It exhibits strong fluorescence under UV light and is photochemically reactive, making it susceptible to degradation when exposed to sunlight.

Benzo[a]pyrene is primarily used as a reference standard in analytical chemistry and environmental monitoring applications. It serves as a marker compound for assessing PAH contamination in environmental samples, food products, and occupational exposure studies. Research laboratories use it for toxicological studies and carcinogenicity testing. Due to its hazardous properties, it has no commercial applications in consumer products and is mainly handled in controlled research and analytical environments.

Benzo[a]pyrene requires strict safety precautions due to its carcinogenic properties. Personnel must wear appropriate PPE including nitrile gloves, safety goggles, and respiratory protection. Work should be conducted in a well-ventilated fume hood to prevent inhalation exposure. Avoid skin contact and ingestion at all costs. Use non-sparking tools and ground equipment to prevent static discharge. Implement proper decontamination procedures and maintain detailed exposure records for occupational health monitoring.

Benzo[a]pyrene should be stored in tightly sealed containers in a cool, dry, well-ventilated area away from direct sunlight and heat sources. The storage area must be secure and accessible only to authorized personnel due to its carcinogenic nature. Keep away from strong oxidizing agents and incompatible materials. Containers should be clearly labeled with appropriate hazard warnings. Regular inventory checks and proper segregation from other chemicals are essential for safe storage management.

Benzo[a]pyrene exposure requires immediate action due to its severe health hazards. For skin contact, immediately remove contaminated clothing and wash affected area thoroughly with soap and water for at least 15 minutes. In case of eye contact, flush with clean water for 15 minutes and remove contact lenses if present. If inhaled, move to fresh air immediately. For ingestion, do not induce vomiting and seek immediate medical attention. Always consult a physician after any exposure incident.

Benzo[a]pyrene disposal must comply with hazardous waste regulations due to its carcinogenic properties. The substance should be collected in appropriate containers and labeled as hazardous waste containing carcinogenic materials. Disposal must be performed through licensed hazardous waste management companies capable of handling carcinogenic substances. Incineration at high temperatures in specialized facilities is typically the preferred disposal method. Never dispose of in regular waste streams or sewage systems.

Benzo[a]pyrene is classified under ADR Class 9 (miscellaneous dangerous substances), Packing Group III for transport purposes. Packages must be properly labeled with appropriate hazard markings and UN identification numbers. Transportation requires compliance with dangerous goods regulations including proper packaging, documentation, and vehicle placarding. Only authorized carriers experienced in handling hazardous materials should transport this substance. Emergency response information must accompany shipments.

Benzo[a]pyrene is subject to extensive regulatory control under various frameworks. Under REACH regulation, it requires registration and safety data sheets. CLP classification mandates specific hazard labeling as Carcinogenic 1B, Mutagenic 1B, and Reproductive Toxicant 1B. Many countries have established occupational exposure limits and require special handling permits. Environmental regulations often include monitoring requirements for emissions and waste disposal. Users must comply with local carcinogen handling protocols and reporting requirements.

Benzo[a]pyrene is available through specialized chemical distributors in Europe, including OYSI, which supplies laboratory-grade chemicals to research institutions and analytical laboratories. Due to its hazardous nature, purchases typically require proper authorization and compliance documentation. Buyers must demonstrate legitimate research or analytical purposes and appropriate safety facilities. OYSI can provide technical support and regulatory guidance for European customers requiring this reference standard for environmental or analytical applications.