1,2,3,4,5,5-hexachlorocyclopenta-1,3-diene

1,2,3,4,5,5-hexachlorocyclopenta-1,3-diene is a highly chlorinated organic compound with the molecular formula C5Cl6 and CAS number 77-47-4. This cyclic diene structure contains six chlorine atoms attached to a five-membered carbon ring, resulting in a molecular weight of 272.8 g/mol. It is classified as a hazardous substance with multiple toxicity classes and environmental dangers, requiring careful handling and specialized safety measures in industrial applications.

1,2,3,4,5,5-hexachlorocyclopenta-1,3-diene is a dense, chlorinated organic liquid at room temperature with characteristic properties typical of heavily halogenated compounds. The substance has limited water solubility due to its hydrophobic nature and high chlorine content. Its high molecular weight of 272.8 g/mol and chlorinated structure contribute to its persistence and bioaccumulation potential, making it a concern for environmental contamination.

1,2,3,4,5,5-hexachlorocyclopenta-1,3-diene serves as an intermediate in chemical synthesis and industrial manufacturing processes. Its highly chlorinated structure makes it valuable in the production of specialized chemicals, pesticides, and flame retardants. The compound may also be used in research applications and as a precursor for other chlorinated organic compounds. However, its high toxicity and environmental persistence have led to restricted use in many applications.

Safe handling of 1,2,3,4,5,5-hexachlorocyclopenta-1,3-diene requires comprehensive personal protective equipment including chemical-resistant gloves, protective clothing, eye protection, and respiratory protection. Work must be conducted in well-ventilated areas or under fume hoods to prevent inhalation exposure. Given its corrosive properties (Skin Corr. 1B) and multiple acute toxicity classifications, minimize direct contact and implement strict containment procedures to prevent spills and environmental release.

1,2,3,4,5,5-hexachlorocyclopenta-1,3-diene must be stored in tightly sealed, chemically compatible containers in a cool, dry, well-ventilated area away from heat sources and incompatible materials. Storage areas should be equipped with secondary containment systems to prevent environmental contamination. Keep containers upright and clearly labeled with appropriate hazard warnings. Access should be restricted to trained personnel only, and inventory should be regularly monitored due to the substance's high toxicity profile.

Immediate action is critical following contact with 1,2,3,4,5,5-hexachlorocyclopenta-1,3-diene due to its corrosive and toxic properties. For skin contact, immediately remove contaminated clothing and flush affected areas with large amounts of water for at least 15 minutes. If inhaled, move to fresh air immediately. For eye contact, rinse thoroughly with water. Seek immediate medical attention in all cases of exposure, as the substance poses severe acute toxicity risks across multiple exposure routes.

1,2,3,4,5,5-hexachlorocyclopenta-1,3-diene requires disposal as hazardous waste through licensed waste management facilities equipped to handle highly toxic and environmentally persistent compounds. The substance cannot be disposed of in regular waste streams due to its aquatic toxicity classification and persistence. Disposal must comply with local and European waste regulations, typically requiring high-temperature incineration in specialized facilities. Detailed waste characterization and chain-of-custody documentation are mandatory.

1,2,3,4,5,5-hexachlorocyclopenta-1,3-diene is classified as ADR Class 6.1 (toxic substances) Packing Group I, indicating the highest level of danger for toxic materials. Transportation requires UN-specification packaging, proper labeling with toxic hazard symbols, and appropriate shipping documentation. Only certified carriers experienced in handling highly toxic materials should transport this substance. Emergency response information must accompany shipments, and routes should minimize public exposure risks.

1,2,3,4,5,5-hexachlorocyclopenta-1,3-diene is subject to extensive European chemical regulations under REACH and CLP due to its high toxicity and environmental hazards. While not currently listed as a Substance of Very High Concern (SVHC), its classification profile suggests potential restrictions on use and marketing. The substance requires safety data sheets, hazard communication, and may be subject to authorization requirements. Users must comply with occupational exposure limits and environmental protection measures.

1,2,3,4,5,5-hexachlorocyclopenta-1,3-diene is available through OYSI, a specialized European distributor of technical chemical products. As a highly regulated substance requiring expert handling and documentation, procurement should only be conducted through established chemical suppliers with appropriate licenses and safety expertise. OYSI provides proper documentation, safety data sheets, and regulatory compliance support for professional and industrial customers requiring this specialized chemical compound.