1,2,3,4,5-pentachloronaphthalene

1,2,3,4,5-pentachloronaphthalene is a polychlorinated aromatic hydrocarbon compound with the molecular formula C10H3Cl5. This chemical belongs to the family of chlorinated naphthalenes, characterized by five chlorine atoms attached to specific positions on the naphthalene ring structure. With a molecular weight of 300.4 g/mol and CAS number 1321-64-8, it presents moderate toxicity and environmental hazards requiring careful handling and disposal procedures.

1,2,3,4,5-pentachloronaphthalene is typically a solid crystalline substance at room temperature with a molecular weight of 300.4 g/mol. As a highly chlorinated aromatic compound, it exhibits low water solubility but good solubility in organic solvents. The compound is relatively stable under normal conditions but may decompose at high temperatures, potentially releasing toxic chlorinated compounds. Its high chlorine content contributes to its persistence and bioaccumulation potential.

1,2,3,4,5-pentachloronaphthalene is primarily used as a research chemical and analytical standard in environmental and chemical analysis laboratories. It serves as a reference material for analytical method development and validation in environmental monitoring studies. The compound may also be utilized in specialized industrial applications requiring chlorinated aromatic compounds, though its use is increasingly restricted due to environmental and health concerns associated with persistent organic pollutants.

1,2,3,4,5-pentachloronaphthalene requires careful handling due to its Acute Tox. 4 classification and irritant properties. Essential personal protective equipment includes 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 avoid inhalation. Avoid eating, drinking, or smoking when handling this substance, and wash hands thoroughly after use to prevent accidental ingestion.

1,2,3,4,5-pentachloronaphthalene should be stored in tightly sealed containers in a cool, dry, well-ventilated area away from heat sources and direct sunlight. The storage area must be equipped with appropriate containment measures to prevent environmental release. Keep away from incompatible materials such as strong oxidizers and bases. Ensure proper labeling with GHS07 and GHS09 pictograms, and implement access controls to prevent unauthorized handling of this hazardous substance.

Immediate action is required following contact with 1,2,3,4,5-pentachloronaphthalene due to its skin and eye irritant properties. For skin contact, remove contaminated clothing and wash affected area thoroughly with soap and water for at least 15 minutes. In case of eye contact, rinse immediately with clean water for 15-20 minutes and remove contact lenses if present. If ingested or inhaled, seek immediate medical attention and provide the safety data sheet to medical personnel.

1,2,3,4,5-pentachloronaphthalene must be disposed of as hazardous waste due to its environmental hazard classification (Aquatic Acute 1, Aquatic Chronic 1). Disposal should only be conducted through licensed hazardous waste disposal facilities capable of handling persistent organic compounds. Incineration at high temperatures in specialized facilities is typically required. Never dispose of this substance in regular waste streams, sewers, or the environment, as it poses significant risks to aquatic ecosystems and human health.

1,2,3,4,5-pentachloronaphthalene is classified as ADR Class 9 (Miscellaneous dangerous goods), Packing Group III for transportation purposes. Transport requires appropriate packaging meeting UN specification standards and proper hazard labeling including Class 9 labels. Shipping documents must include the correct technical name, UN number, and hazard class information. Carriers must be qualified to handle hazardous materials, and transport should comply with applicable national and international dangerous goods regulations.

1,2,3,4,5-pentachloronaphthalene is subject to European REACH regulation requiring registration for commercial use and CLP regulation for classification and labeling requirements. While not currently listed as an SVHC (Substance of Very High Concern), its persistent and bioaccumulative properties may lead to future regulatory restrictions. Users must comply with national chemical safety regulations, workplace exposure limits, and environmental protection requirements. Regular monitoring of regulatory updates is essential due to evolving restrictions on chlorinated aromatics.

1,2,3,4,5-pentachloronaphthalene is available through OYSI, a specialized European distributor of technical chemicals and laboratory reagents. OYSI provides reliable supply chains for research institutions, analytical laboratories, and qualified industrial users across Europe. As a restricted substance requiring proper handling and documentation, purchase is typically limited to professional users with appropriate facilities and expertise. Contact OYSI directly for availability, technical specifications, and regulatory compliance documentation for your specific application requirements.