Skip Navigation

---

Search as

Browse Haz-Map

Agent Name Hexachlorocyclopentadiene CAS Number 77-47-4 Formula C5-Cl6 Major Category Toxic Gases & Vapors Synonyms 1,2,3,4,5,5-Hexachloro-1,3-cyclopentadiene; 1,3-Cyclopentadiene, 1,2,3,4,5,5-hexachloro-; 1,3-Cyclopentadiene, hexachloro-; C 56; C-56; C56; Cyclopentadiene, hexachloro-; Graphlox; HRS 1655; Hexachlorcyklopentadien [Czech]; Hexachloro-1,3-cyclopentadiene; Hexachlorocyclopentadiene; Perchloro-1,3-cyclopentadiene; Perchlorocyclopentadiene; [ChemIDplus] UN2646 Category Other Toxic Gases & Vapors Description Pale-yellow to amber-colored liquid with a pungent, unpleasant odor. [Note: A solid below 16 degrees F.]; [NIOSH] Sources/Uses Used in the manufacture of some chlorinated pesticides; [ACGIH] Comments Corrosive to skin; [Quick CPC] Contact with liquid may cause blistering of the skin. [CHRIS] Daily exposures to 0.34 ppm cause pulmonary edema as well as liver and kidney injury in experimental animals. Workers avoid exposure because of its odor and irritating properties. [ACGIH] Exposure Assessment Skin Designation (ACGIH) No TIH Yes TLV (ACGIH) 0.01 ppm Vapor Pressure 0.08 mm Hg Odor Threshold Low 0.15 ppm Lethal Concentration LC50 (rats) = 1.6 ppm/4h Explanatory Notes An odor threshold of 0.15 ppm has been reported. [ACGIH] Reference Link ATSDR ToxFAQs - Hexachlorocyclopentadiene Adverse Effects Toxic Pneumonitis Yes Dermatotoxin Skin Burns Hepatotoxin Hepatotoxin, Secondary Links to Other NLM Databases Health Studies Human Health Effects from Hazardous Substances Data Bank: HEXACHLOROCYCLOPENTADIENE   Toxicity Information Search TOXNET Chemical Information Search ChemIDplus Related Information in Haz-Map Diseases Occupational diseases associated with exposure to this agent: Pneumonitis, toxic

---

Specialized Information Services   U.S. National Library of Medicine,
8600 Rockville Pike, Bethesda, MD 20894
National Institutes of Health
Privacy/Disclaimer Notice
Customer Service: tehip@teh.nlm.nih.gov
Last updated: January, 2009