1,4-dichlorobenzene

1,4-dichlorobenzene is an aromatic organochlorine compound with the molecular formula C6H4Cl2 and CAS number 106-46-7. It consists of a benzene ring with two chlorine atoms positioned at opposite ends (para-position). This white crystalline solid has a distinctive sweet odor and a molecular weight of 147 g/mol. It is classified as a Category 2 carcinogen and poses risks to aquatic environments.

1,4-dichlorobenzene is a white crystalline solid at room temperature with a characteristic sweet, mothball-like odor. It has a melting point of 53°C and boiling point of 174°C. The compound is poorly soluble in water but readily dissolves in organic solvents such as alcohol, ether, and benzene. It has a density of 1.458 g/cm³ and exhibits volatility at ambient temperatures.

1,4-dichlorobenzene is primarily used as a chemical intermediate in the production of polyphenylene sulfide resins and other specialty polymers. It serves as a precursor for pharmaceuticals, agrochemicals, and dyes. The compound is also utilized as a fumigant and moth repellent, though these applications are increasingly restricted due to health concerns. Industrial applications include its use as a process solvent and deodorizer.

1,4-dichlorobenzene requires careful handling with appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and respiratory protection when ventilation is inadequate. Work should be conducted in well-ventilated areas or under fume hoods to prevent inhalation. Avoid skin and eye contact, and prevent ingestion. Use non-sparking tools and ensure proper grounding to prevent static electricity buildup during handling operations.

1,4-dichlorobenzene should be stored in a cool, dry, well-ventilated area away from heat sources, ignition sources, and direct sunlight. Keep containers tightly sealed to prevent vapor release and contamination. Store away from strong oxidizing agents, acids, and bases. Maintain storage temperatures below 25°C and ensure adequate separation from incompatible materials. Use appropriate containment measures to prevent environmental release.

In case of skin contact with 1,4-dichlorobenzene, 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 15 minutes while keeping eyelids open. If inhaled, move to fresh air immediately. In case of ingestion, do not induce vomiting and seek immediate medical attention, providing the safety data sheet to medical personnel.

1,4-dichlorobenzene must be disposed of as hazardous waste through licensed waste management companies in accordance with local, national, and EU regulations. The substance cannot be disposed of in regular waste streams or sewage systems due to its environmental hazard classification. Incineration at authorized high-temperature facilities is typically the preferred disposal method. Always consult local environmental authorities for specific disposal requirements and approved disposal facilities.

1,4-dichlorobenzene is classified as ADR Class 9 (Miscellaneous dangerous substances), Packing Group III for transportation purposes. It requires proper packaging in UN-approved containers with appropriate labeling including the Class 9 hazard label. Transport vehicles must carry proper documentation and emergency response information. Drivers require ADR training for Class 9 substances, and specific routing and parking restrictions may apply depending on local regulations.

1,4-dichlorobenzene is subject to comprehensive EU regulations including REACH registration requirements and CLP classification as Carcinogenic Category 2, Eye Irritant 2, and Aquatic hazard. It may be subject to restrictions under REACH Annex XVII depending on intended use. The substance requires safety data sheets and appropriate hazard communication. Users must comply with occupational exposure limits and environmental discharge restrictions established by member states.

1,4-dichlorobenzene is available through OYSI, a European distributor of specialty chemicals serving industrial customers across Europe. OYSI provides technical-grade 1,4-dichlorobenzene with full regulatory compliance including REACH registration, safety data sheets, and proper packaging. As an established chemical distributor, OYSI ensures reliable supply chains and technical support for industrial applications requiring this specialized aromatic compound.