1,3-dichlorobenzene

1,3-dichlorobenzene is an aromatic organochlorine compound with the molecular formula C6H4Cl2 and CAS number 541-73-1. It consists of a benzene ring with two chlorine atoms attached at the 1 and 3 positions (meta-dichlorobenzene). With a molecular weight of 147 g/mol, this chemical is classified as moderately toxic and poses chronic aquatic environmental hazards. It belongs to the dichlorobenzene isomer family and is used primarily as an industrial intermediate and solvent in various chemical processes.

1,3-dichlorobenzene is a colorless to pale yellow liquid at room temperature with a characteristic sweet, aromatic odor. It has a boiling point of approximately 173°C and a melting point of -24.7°C. The compound is practically insoluble in water but readily dissolves in organic solvents such as alcohol, ether, and benzene. It has a density of about 1.29 g/cm³ and exhibits low volatility. The substance is stable under normal conditions but should be protected from strong oxidizing agents and extreme temperatures.

1,3-dichlorobenzene is primarily used as an intermediate in the synthesis of pesticides, herbicides, and pharmaceutical compounds. It serves as a solvent in chemical reactions and industrial processes, particularly in the production of dyes and pigments. The compound is also utilized in the manufacture of specialty chemicals and as a raw material for producing other chlorinated aromatic compounds. In laboratory settings, it functions as a reaction medium and extraction solvent for various organic synthesis procedures.

1,3-dichlorobenzene requires careful handling with appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and protective clothing. Work should be conducted in well-ventilated areas or under fume extraction to prevent inhalation exposure. Avoid skin and eye contact, as the substance can cause irritation. Ensure no smoking, open flames, or heat sources are present during handling. Use proper grounding and bonding procedures when transferring the material to prevent static electricity buildup. Always wash hands thoroughly after handling.

1,3-dichlorobenzene should be stored in tightly sealed containers in a cool, dry, well-ventilated area away from heat sources, ignition sources, and direct sunlight. Store separately from strong oxidizing agents, strong bases, and reactive metals to prevent incompatible reactions. Containers should be made of compatible materials such as stainless steel or appropriate plastics. Maintain storage temperatures below 25°C when possible and ensure proper labeling with hazard information. Implement appropriate spill containment measures and restrict access to authorized personnel only.

In case of skin contact with 1,3-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 15-20 minutes and seek medical attention. If inhaled, move the person to fresh air and monitor breathing; provide artificial respiration if necessary. In case of ingestion, do not induce vomiting and seek immediate medical attention. Always consult a physician if symptoms develop or persist after exposure.

1,3-dichlorobenzene must be disposed of as hazardous waste according to local, national, and EU regulations including the Waste Framework Directive. The substance cannot be disposed of in regular waste streams or sewage systems due to its toxicity and environmental persistence. Contact licensed hazardous waste disposal companies for proper treatment, which typically involves high-temperature incineration or specialized chemical treatment. Maintain proper documentation of disposal activities and ensure compliance with waste tracking requirements. Empty containers should also be treated as hazardous waste.

1,3-dichlorobenzene is classified as ADR Class 6.1 (toxic substances), Packing Group III for transport purposes. It must be packaged in UN-approved containers with proper hazard labels and documentation. Transport vehicles require appropriate placarding and drivers must hold ADR certification for Class 6.1 substances. Shipping papers must include the proper shipping name, UN number, hazard class, and packing group. Emergency response information must accompany shipments, and transport should avoid extreme temperatures and rough handling to prevent container damage.

1,3-dichlorobenzene is subject to various European regulations including REACH registration requirements and CLP classification obligations. It is classified under GHS with warning pictograms GHS07 and GHS09, indicating acute toxicity and aquatic environmental hazards. The substance is not currently listed as a Substance of Very High Concern (SVHC) under REACH. Users must comply with occupational exposure limits, environmental discharge restrictions, and proper hazard communication requirements. Industrial users may need to implement risk management measures and report usage under REACH obligations.

1,3-dichlorobenzene is available through OYSI, a European distributor of technical chemicals serving industrial customers across the continent. OYSI provides this substance to qualified industrial users with proper documentation, safety data sheets, and regulatory compliance support. As a specialized chemical distributor, OYSI ensures product quality and regulatory compliance while offering technical support for industrial applications. Contact OYSI directly for availability, specifications, and ordering information, ensuring you meet all regulatory requirements for purchasing and using this controlled substance.