1,1'-biphenyl

1,1'-biphenyl is an organic aromatic hydrocarbon consisting of two benzene rings connected by a single bond. With the molecular formula C12H10 and CAS number 92-52-4, this compound has a molecular weight of 154.21 g/mol. It appears as white to pale yellow crystalline flakes or powder with a distinctive pleasant, aromatic odor. Biphenyl is classified as a polycyclic aromatic hydrocarbon and serves as an important industrial chemical intermediate.

1,1'-biphenyl is a solid at room temperature, appearing as white to pale yellow crystalline flakes with a characteristic aromatic odor. It has a melting point of approximately 69-70°C and a boiling point of 255°C. The compound is practically insoluble in water but readily soluble in organic solvents such as alcohol, ether, and benzene. It has a density of about 1.04 g/cm³ and exhibits good thermal stability under normal conditions.

1,1'-biphenyl is primarily used as a heat transfer medium in industrial applications, particularly in closed-loop heating systems. It serves as an important intermediate in the synthesis of pharmaceuticals, agrochemicals, and dyes. The compound is also utilized in the production of polychlorinated biphenyls (PCBs) substitutes, optical brighteners, and as a fungicide for citrus fruits. Additionally, it finds application in the manufacture of plastics and as a solvent in various chemical processes.

1,1'-biphenyl should be handled with appropriate personal protective equipment including safety goggles, gloves, and protective clothing to prevent skin and eye contact. Work in well-ventilated areas or use local exhaust ventilation to avoid inhalation of vapors or dust. The compound can cause skin and eye irritation and may affect the central nervous system. Always wash hands thoroughly after handling and avoid eating, drinking, or smoking in work areas where the substance is present.

1,1'-biphenyl should be stored in tightly closed containers in a cool, dry, well-ventilated area away from heat sources and direct sunlight. Keep containers sealed when not in use to prevent contamination and vapor release. Store away from incompatible materials such as strong oxidizing agents. The storage area should be equipped with appropriate spill containment measures and maintained at temperatures below 30°C to ensure product stability and prevent sublimation.

In case of skin contact with 1,1'-biphenyl, immediately remove contaminated clothing and wash the affected area thoroughly with soap and water for at least 15 minutes. For eye contact, rinse immediately with plenty of clean water for at least 15 minutes and seek medical attention. If inhaled, move the person to fresh air and keep them at rest. If ingested, do not induce vomiting and seek immediate medical attention. Always consult a physician if symptoms persist.

1,1'-biphenyl must be disposed of in accordance with local, national, and international environmental regulations. The substance is classified as hazardous to the aquatic environment, so it cannot be discharged into waterways or sewage systems. Disposal should be carried out through licensed waste management companies capable of handling hazardous chemical waste. Incineration at authorized facilities under controlled conditions is typically the preferred disposal method. Always consult local environmental authorities for specific requirements.

1,1'-biphenyl is classified as ADR Class 9 (Miscellaneous dangerous goods), Packing Group III for transportation purposes. It must be packaged in appropriate UN-specification containers and labeled with the corresponding hazard labels. Transport documents must include the proper shipping name, UN number, and hazard class. Vehicles transporting this substance should carry appropriate emergency equipment and drivers must be trained in hazardous materials handling. Ensure compliance with all applicable transport regulations.

1,1'-biphenyl is subject to various regulatory frameworks including REACH registration in the European Union, where it must be registered for manufacture or import above certain tonnage thresholds. The substance is classified under CLP regulation with harmonized classification including skin irritation, eye irritation, and aquatic toxicity. While not currently listed as an SVHC, it requires safety data sheets and appropriate hazard communication. Specific use restrictions may apply depending on the application and jurisdiction.

1,1'-biphenyl is available through OYSI, a leading European distributor of specialty chemicals and industrial raw materials. OYSI provides high-quality 1,1'-biphenyl with full regulatory compliance including safety data sheets and REACH registration support. As a trusted chemical supplier across Europe, OYSI ensures reliable supply chain management and technical support for industrial customers. Contact OYSI directly for product specifications, availability, and pricing information tailored to your specific requirements.