Benzo[a]anthracene

Benzo[a]anthracene is a polycyclic aromatic hydrocarbon (PAH) with the molecular formula C18H12 and CAS number 56-55-3. This organic compound consists of four fused benzene rings arranged in a specific angular configuration. With a molecular weight of 228.3 g/mol, it appears as crystalline solid at room temperature. Benzo[a]anthracene is classified as a Category 1B carcinogen and poses significant environmental hazards to aquatic life, requiring careful handling and strict safety protocols in industrial applications.

Benzo[a]anthracene is a solid crystalline compound at room temperature, typically appearing as pale yellow to colorless crystals or powder. It has limited water solubility due to its hydrophobic aromatic structure but dissolves readily in organic solvents such as benzene, toluene, and chloroform. The compound exhibits high thermal stability and low volatility. Its melting point ranges around 160-162°C, and it demonstrates fluorescent properties under UV light, which is characteristic of many polycyclic aromatic hydrocarbons.

Benzo[a]anthracene is primarily used in scientific research applications, particularly in cancer research studies and environmental monitoring programs. It serves as a reference standard in analytical chemistry for detecting PAH contamination in environmental samples. The compound is utilized in photochemical research due to its fluorescent properties and in studies investigating the metabolic pathways of polycyclic aromatic hydrocarbons. Industrial applications are limited due to its carcinogenic classification, with most uses confined to controlled laboratory environments and specialized research facilities.

Benzo[a]anthracene requires strict safety protocols due to its carcinogenic properties. Always wear appropriate personal protective equipment including nitrile gloves, safety goggles, and respiratory protection in well-ventilated areas or fume hoods. Avoid skin contact, inhalation, and ingestion completely. Use only in controlled laboratory environments with proper ventilation systems. Implement engineering controls such as local exhaust ventilation and work in designated areas away from food and beverages. Regular health monitoring and training on carcinogen handling procedures are essential for personnel working with this substance.

Benzo[a]anthracene should be stored in tightly sealed containers in a cool, dry, and well-ventilated area away from direct sunlight and heat sources. Keep the substance in its original packaging with clear hazard labeling and store in designated areas for carcinogenic materials with restricted access. Maintain storage temperatures below 25°C and protect from moisture and incompatible materials. Implement proper inventory management with regular inspections of container integrity. Storage areas must comply with local regulations for carcinogenic substances and include appropriate spill containment measures.

Immediate decontamination is crucial following any contact with benzo[a]anthracene. For skin contact, remove contaminated clothing immediately and wash the affected area thoroughly with soap and water for at least 15 minutes. In case of eye contact, flush with clean water for 15 minutes while holding eyelids open. If inhaled, move the person to fresh air immediately. For ingestion, do not induce vomiting and seek immediate medical attention. Always contact emergency medical services and provide them with the safety data sheet for proper treatment guidance.

Benzo[a]anthracene must be disposed of as hazardous waste through licensed waste management companies specializing in carcinogenic substances. Never dispose of this material in regular waste streams or pour down drains due to its environmental toxicity and carcinogenic properties. Collect waste in appropriate containers with proper labeling and documentation. Follow local and national regulations for hazardous waste disposal, including proper manifesting and tracking procedures. Incineration at high temperatures in specialized facilities is typically the preferred disposal method for PAH compounds.

Benzo[a]anthracene is classified under ADR Class 9 (Miscellaneous dangerous goods), Packing Group III for transportation purposes. It must be packaged in UN specification containers with appropriate hazard labels and documentation including transport documents and emergency response information. Vehicles must comply with ADR requirements for Class 9 substances, and drivers need proper training and certification. The packages should be properly marked with the correct shipping name, UN number, and orientation arrows if applicable. Temperature control during transport may be necessary to maintain product stability.

Benzo[a]anthracene is subject to comprehensive regulatory oversight under REACH regulation in Europe, requiring registration for manufacture or import above certain tonnages. The CLP regulation mandates specific hazard classification and labeling as Carcinogen 1B and environmental hazard. National occupational exposure limits apply in many countries due to its carcinogenic properties. Import/export may require permits or notifications depending on jurisdiction. Environmental monitoring requirements often include this compound in PAH screening programs, and waste disposal is strictly regulated under hazardous waste legislation.

Benzo[a]anthracene is available through specialized chemical distributors in Europe, including OYSI, which supplies high-quality research chemicals to laboratories and research institutions. Due to its carcinogenic classification, purchases typically require proper documentation including end-use declarations and institutional approvals. Suppliers must ensure compliance with REACH registration requirements and provide comprehensive safety documentation. Most suppliers offer various purities and packaging sizes suitable for research applications, with delivery restricted to qualified facilities with appropriate handling capabilities and regulatory permits.