1,2,3,4,5-pentachloronaphthalene

1,2,3,4,5-pentachloronaphthalene is a polychlorinated aromatic compound derived from naphthalene with five chlorine atoms substituted at positions 1, 2, 3, 4, and 5. With the molecular formula C10H3Cl5 and CAS number 1321-64-8, this substance has a molecular weight of 300.4 g/mol. It belongs to the family of chlorinated naphthalenes, which are synthetic organic compounds used in various industrial applications requiring chemical stability and specific properties.

1,2,3,4,5-pentachloronaphthalene is typically a solid crystalline substance at room temperature with a characteristic aromatic odor. The high degree of chlorination (five chlorine atoms) makes it relatively non-polar and poorly soluble in water, but soluble in organic solvents such as benzene, toluene, and chlorinated hydrocarbons. Its molecular structure provides thermal stability and resistance to degradation, making it persistent in environmental conditions.

1,2,3,4,5-pentachloronaphthalene is used primarily in industrial applications requiring chemical stability and specific physical properties. It serves as an intermediate in chemical synthesis, particularly in the production of dyes, pigments, and other organic compounds. Its chlorinated structure makes it valuable in applications requiring flame retardancy or chemical resistance. It may also be used in research and analytical chemistry as a reference standard or reagent.

1,2,3,4,5-pentachloronaphthalene must be handled with appropriate personal protective equipment including chemical-resistant gloves, safety goggles, and protective clothing to prevent skin and eye contact. Work in well-ventilated areas or use local exhaust ventilation to minimize inhalation exposure. The substance is classified as Acute Tox. 4, Skin Irrit. 2, and Eye Irrit. 2, requiring careful handling to avoid direct contact and inhalation of dust or vapors.

1,2,3,4,5-pentachloronaphthalene should be stored in a cool, dry, well-ventilated area away from heat sources and incompatible materials. Keep containers tightly sealed to prevent contamination and moisture absorption. Store in original containers with proper labeling showing GHS07 and GHS09 pictograms. Ensure storage areas are equipped with appropriate spill containment measures and access is restricted to authorized personnel due to its hazardous classification.

In case of skin contact with 1,2,3,4,5-pentachloronaphthalene, 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 at least 15 minutes and seek medical attention. If inhaled, move to fresh air immediately. In case of ingestion, do not induce vomiting and seek immediate medical attention. Always consult the safety data sheet for specific emergency procedures.

1,2,3,4,5-pentachloronaphthalene must be disposed of as hazardous waste in accordance with local, national, and EU regulations. Due to its aquatic toxicity classification (Aquatic Acute 1, Aquatic Chronic 1), it cannot be discharged to water systems or regular waste streams. Contact licensed hazardous waste disposal companies for proper treatment, which typically involves high-temperature incineration in authorized facilities. Always consult local environmental authorities for specific disposal requirements.

1,2,3,4,5-pentachloronaphthalene is classified as ADR Class 9 (Miscellaneous dangerous substances), Packing Group III for transportation purposes. It must be packaged in UN-approved containers with appropriate labeling and documentation. Transport vehicles must carry proper emergency equipment and drivers require ADR certification. Shipping documents must include the correct UN number, proper shipping name, hazard class, and packing group information according to international dangerous goods regulations.

1,2,3,4,5-pentachloronaphthalene is subject to REACH regulation requiring registration for manufacture or import above one tonne per year in the EU. It must be classified and labeled according to CLP regulation with Warning signal word and appropriate GHS pictograms (GHS07, GHS09). While not currently listed as SVHC, its environmental and health hazard profile means it may be subject to additional restrictions or monitoring requirements depending on specific applications and volumes used.

1,2,3,4,5-pentachloronaphthalene is available through OYSI, a European distributor specializing in technical chemicals. OYSI provides this substance with proper documentation including safety data sheets, certificates of analysis, and regulatory compliance information required for industrial use. As a specialized chemical distributor, OYSI ensures proper packaging, labeling, and transport according to ADR regulations while maintaining quality standards for professional applications across European markets.