# NIOSH Pocket Guide to Chemical Hazards
Hexachlorobutadiene | CAS 87-68-3
Cl2C=CClCCl=CCl2 | RTECS EJ0700000
Synonyms & Trade Names HCBD; Hexachloro-1,3-butadiene; 1,3-Hexachlorobutadiene; Perchlorobutadiene | DOT ID & Guide 2279 151
Exposure Limits | NIOSH REL: Ca TWA 0.02 ppm (0.24 mg/m3) [skin] See Appendix A
OSHA PEL†: none
IDLH Ca [N.D.] | Conversion 1 ppm = 10.66 mg/m3
Physical Description Clear, colorless liquid with a mild, turpentine-like odor.
MW: 260.7 | BP: 419°F | FRZ: -6°F | Sol: Insoluble
VP: 0.2 mmHg | IP: ? |  | Sp.Gr: 1.55
Fl.P: ? | UEL: ? | LEL: ? |
Combustible Liquid
Incompatibilities & Reactivities Oxidizers
Measurement Methods NIOSH 2543
Personal Protection & Sanitation Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet or contaminated Change: No recommendation Provide: Eyewash, Quick drench | First Aid (See procedures) Eye: Irrigate immediately Skin: Soap wash immediately Breathing: Respiratory support Swallow: Medical attention immediately
Respirator Recommendations NIOSH At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration: (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode/(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus Escape: (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms In animals: irritation eyes, skin, respiratory system; kidney damage; [potential occupational carcinogen]
Target Organs Eyes, skin, respiratory system, kidneys Cancer Site [in animals: kidney tumors]
See also: INTRODUCTION