1,1'-biphenyl

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

1,1'-biphenyl is a solid crystalline substance at room temperature, typically appearing as white to pale yellow crystals or flakes. It has a characteristic pleasant aromatic odor and is practically insoluble in water but readily soluble in organic solvents such as alcohol, ether, and benzene. The compound has a melting point around 69-70°C and a boiling point of approximately 255°C. It is stable under normal conditions but may undergo oxidation when exposed to strong oxidizing agents.

1,1'-biphenyl is primarily used as an intermediate in the synthesis of various chemicals and pharmaceuticals. It serves as a heat transfer medium in industrial processes due to its thermal stability. The compound is also utilized in the production of dyes, optical brighteners, and as a fungicide for citrus fruits. Additionally, it finds applications in the manufacture of polychlorinated biphenyls (PCBs) precursors and as a solvent in certain industrial processes, though environmental concerns have limited some of these uses.

1,1'-biphenyl requires careful handling due to its skin and eye irritation potential and specific target organ toxicity. Always wear appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and protective clothing. Ensure adequate ventilation to prevent inhalation of vapors or dust. Avoid direct skin and eye contact, and do not eat, drink, or smoke while handling. Work in well-ventilated areas or under fume hoods, and wash hands thoroughly after handling to prevent accidental exposure.

1,1'-biphenyl should be stored in a cool, dry, well-ventilated area away from heat sources, ignition sources, and direct sunlight. Keep containers tightly closed and store in original packaging or compatible containers. Maintain storage temperature below 25°C to prevent sublimation. Separate from strong oxidizing agents and incompatible materials. Ensure storage areas are equipped with appropriate spill containment measures and comply with local fire safety regulations. Regular inspection of containers for damage or deterioration is recommended.

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, flush immediately with clean water for at least 15 minutes while holding eyelids open. If inhaled, move the person to fresh air and keep them at rest. If swallowed, do not induce vomiting; rinse mouth with water. Seek medical attention if irritation persists or symptoms develop after any type of exposure.

1,1'-biphenyl must be disposed of as hazardous waste in accordance with local, national, and EU regulations due to its environmental hazard classification. Contact licensed waste disposal companies for proper handling and treatment. Incineration at authorized high-temperature facilities is typically the preferred disposal method. Never discharge into drains, waterways, or the environment as it poses risks to aquatic life. Empty containers should also be treated as hazardous waste unless properly cleaned and decontaminated according to regulatory requirements.

1,1'-biphenyl is classified as ADR Class 9 (Miscellaneous Dangerous Substances), Packing Group III for transportation purposes. It requires appropriate hazardous goods packaging, labeling, and documentation during transport. Vehicles must carry proper placards and emergency response information. Transport should be conducted by trained personnel familiar with dangerous goods regulations. Ensure packages are properly secured to prevent damage during transit and that emergency response procedures are readily available in case of incidents during transportation.

1,1'-biphenyl is subject to various European regulations including REACH registration requirements and CLP classification as STOT SE 3, Skin Irritant 2, Eye Irritant 2, and Aquatic hazard categories. However, it is not currently listed as an SVHC (Substance of Very High Concern). Companies handling this substance must comply with occupational safety regulations, environmental protection laws, and proper waste disposal requirements. Regular safety data sheet updates and risk assessments are mandatory for commercial users and distributors.

1,1'-biphenyl is available through OYSI, a specialized European distributor of technical chemicals. As an established chemical supplier, OYSI can provide this substance with proper documentation, safety data sheets, and regulatory compliance support. For procurement, contact OYSI directly to discuss your specific requirements, quantities, and delivery options. Other authorized chemical distributors and manufacturers may also supply this substance, but ensure they provide proper REACH registration documentation and meet all regulatory requirements for safe handling and transport.