2,3,5,6-tetrachlorocyclohexa-2,5-diene-1,4-dione

2,3,5,6-tetrachlorocyclohexa-2,5-diene-1,4-dione is an organochlorine compound with the molecular formula C6Cl4O2 and CAS number 118-75-2. This chemical substance has a molecular weight of 245.9 g/mol and features a cyclohexadiene ring structure with four chlorine atoms and two ketone groups. It is classified as a skin and eye irritant and poses significant environmental hazards to aquatic life, requiring careful handling in industrial applications.

2,3,5,6-tetrachlorocyclohexa-2,5-diene-1,4-dione is a solid crystalline compound at room temperature with a characteristic yellow to orange coloration. The substance typically exhibits low water solubility due to its chlorinated aromatic structure, but shows good solubility in organic solvents. Its molecular structure contains four chlorine substituents on a cyclic diene backbone with two ketone functional groups, contributing to its chemical reactivity and environmental persistence.

2,3,5,6-tetrachlorocyclohexa-2,5-diene-1,4-dione serves primarily as a chemical intermediate in organic synthesis and industrial manufacturing processes. The compound is utilized in the production of various chlorinated derivatives and specialty chemicals. Its reactive ketone groups and chlorinated structure make it valuable for specific chemical transformations in pharmaceutical, agrochemical, and fine chemical industries where precise molecular modifications are required.

Safe handling of 2,3,5,6-tetrachlorocyclohexa-2,5-diene-1,4-dione requires appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and protective clothing to prevent skin and eye contact. Work should be conducted in well-ventilated areas or under fume hoods to minimize inhalation exposure. Given its skin and eye irritant properties (GHS07 pictogram), avoid direct contact and ensure emergency eyewash stations and safety showers are readily accessible.

2,3,5,6-tetrachlorocyclohexa-2,5-diene-1,4-dione should be stored in a cool, dry, well-ventilated area away from direct sunlight and heat sources. The substance must be kept in tightly sealed, chemically compatible containers to prevent moisture absorption and contamination. Storage areas should be equipped with appropriate spill containment measures due to its environmental hazard classification (GHS09). Keep away from incompatible materials such as strong bases and reducing agents.

Immediate first aid measures for 2,3,5,6-tetrachlorocyclohexa-2,5-diene-1,4-dione contact include flushing affected skin or eyes with copious amounts of clean water for at least 15 minutes. Remove contaminated clothing immediately and continue rinsing the affected area. For eye contact, hold eyelids open while flushing. Seek medical attention if irritation persists or develops. Do not rub affected areas, as this may worsen irritation symptoms.

Disposal of 2,3,5,6-tetrachlorocyclohexa-2,5-diene-1,4-dione must comply with local and European waste regulations due to its environmental hazard classification. The substance should be collected and disposed of through licensed hazardous waste disposal facilities capable of handling chlorinated organic compounds. Never discharge into sewers, waterways, or soil due to its aquatic toxicity. Contaminated packaging and materials must also be treated as hazardous waste.

Transportation of 2,3,5,6-tetrachlorocyclohexa-2,5-diene-1,4-dione falls under ADR Class 9 (Miscellaneous dangerous substances), Packing Group III. This classification requires appropriate packaging, labeling, and documentation according to dangerous goods regulations. Shipments must display the Class 9 hazard label and proper shipping name. Transport vehicles should be equipped with appropriate emergency equipment, and drivers must hold valid dangerous goods training certificates for Class 9 substances.

2,3,5,6-tetrachlorocyclohexa-2,5-diene-1,4-dione is subject to European REACH regulation requiring registration and compliance with safety data sheet provisions. The substance is classified under CLP regulation with Warning signal word and specific hazard categories (Skin Irrit. 2, Eye Irrit. 2, Aquatic Acute/Chronic 1). While not currently listed as a SVHC (Substance of Very High Concern), its environmental properties require strict adherence to waste and emission control regulations.

2,3,5,6-tetrachlorocyclohexa-2,5-diene-1,4-dione is available through OYSI, a specialized European distributor of technical chemicals. OYSI provides this compound with full regulatory compliance, including proper documentation and safety data sheets required under European regulations. As experienced chemical distributors, OYSI ensures quality control and proper handling throughout the supply chain, serving various industrial sectors across Europe with reliable chemical sourcing solutions.