2,3,5,6-tetrachlorobenzene-1,4-dicarbonitrile

2,3,5,6-tetrachlorobenzene-1,4-dicarbonitrile is an organochlorine compound with the molecular formula C8Cl4N2 and CAS number 1897-41-2. This aromatic chemical features a benzene ring substituted with four chlorine atoms and two nitrile groups, giving it a molecular weight of 265.9 g/mol. It is classified as a skin sensitizer and poses environmental hazards to aquatic life, requiring careful handling in industrial applications.

2,3,5,6-tetrachlorobenzene-1,4-dicarbonitrile is typically a crystalline solid at room temperature due to its highly substituted aromatic structure. The presence of four chlorine atoms and two nitrile groups makes it relatively nonpolar and likely poorly soluble in water but soluble in organic solvents. Its high degree of chlorination contributes to its chemical stability and persistence in the environment.

2,3,5,6-tetrachlorobenzene-1,4-dicarbonitrile is primarily used as an intermediate in organic synthesis and chemical manufacturing processes. Its structure makes it valuable for producing specialized chemicals, pharmaceuticals, and potentially agrochemical compounds. The compound's multiple reactive sites (nitrile groups) and stable aromatic core make it useful in advanced chemical transformations requiring specific substitution patterns.

2,3,5,6-tetrachlorobenzene-1,4-dicarbonitrile must be handled with appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and protective clothing due to its skin sensitization properties. Work should be conducted in well-ventilated areas or under fume hoods to minimize exposure. The compound requires careful handling to prevent environmental release given its aquatic toxicity classification under GHS07 and GHS09 pictograms.

2,3,5,6-tetrachlorobenzene-1,4-dicarbonitrile should be stored in a cool, dry, well-ventilated area away from incompatible materials and ignition sources. Containers must be tightly sealed and properly labeled according to GHS requirements showing Warning signal word and appropriate pictograms. Storage areas should have spill containment measures to prevent environmental contamination due to the compound's aquatic toxicity properties.

Immediate skin contact with 2,3,5,6-tetrachlorobenzene-1,4-dicarbonitrile requires thorough washing with soap and water for at least 15 minutes, removing contaminated clothing. For eye contact, flush immediately with clean water for 15 minutes. If inhaled, move to fresh air immediately. Given the compound's skin sensitization properties, seek medical attention if irritation develops or persists after exposure.

2,3,5,6-tetrachlorobenzene-1,4-dicarbonitrile must be disposed of through licensed hazardous waste management facilities due to its environmental hazard classification. The compound cannot be discharged to sewers or waterways given its acute and chronic aquatic toxicity. Disposal must comply with local and European waste regulations, typically requiring high-temperature incineration or other approved treatment methods for chlorinated organic compounds.

2,3,5,6-tetrachlorobenzene-1,4-dicarbonitrile is classified as ADR Class 9 (Miscellaneous dangerous goods), Packing Group III, indicating moderate transport hazard. Packages must be properly labeled and marked according to ADR regulations with appropriate hazard labels. Transport requires compliance with dangerous goods documentation requirements and proper packaging to prevent environmental release during transit.

2,3,5,6-tetrachlorobenzene-1,4-dicarbonitrile is subject to REACH registration requirements for manufacture or import above threshold quantities in the EU. The compound is classified under CLP regulation with specific hazard statements for skin sensitization and aquatic toxicity. While not currently listed as a SVHC, its environmental properties require compliance with various environmental protection regulations and proper risk assessment procedures.

2,3,5,6-tetrachlorobenzene-1,4-dicarbonitrile is available through OYSI, a specialized European distributor of technical chemicals. OYSI can provide this compound with proper documentation, safety data sheets, and regulatory compliance support for professional and industrial customers. As a regulated chemical requiring careful handling, purchase is typically restricted to qualified industrial users with appropriate facilities and expertise.