# NIOSH Pocket Guide to Chemical Hazards
1,1,2,2-Tetrachloroethane | CAS 79-34-5
CHCl2CHCl2 | RTECS KI8575000
Synonyms & Trade Names Acetylene tetrachloride, Symmetrical tetrachloroethane | DOT ID & Guide 1702 151
Exposure Limits | NIOSH REL: Ca TWA 1 ppm (7 mg/m3) [skin] See Appendix A See Appendix C (Chloroethanes)
OSHA PEL†: TWA 5 ppm (35 mg/m3) [skin]
IDLH Ca [100 ppm] | Conversion 1 ppm = 6.87 mg/m3
Physical Description Colorless to pale-yellow liquid with a pungent, chloroform-like odor.
MW: 167.9 | BP: 296°F | FRZ: -33°F | Sol: 0.3%
VP: 5 mmHg | IP: 11.10 eV |  | Sp.Gr(77°F): 1.59
Fl.P: NA | UEL: NA | LEL: NA |
Noncombustible Liquid
Incompatibilities & Reactivities Chemically-active metals, strong caustics, fuming sulfuric acid [Note: Degrades slowly when exposed to air.]
Measurement Methods NIOSH 1019; OSHA 7
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 promptly Breathing: Respiratory support Swallow: Medical attention immediately
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 Nausea, vomiting, abdominal pain; tremor fingers; jaundice, hepatitis, liver tenderness; dermatitis; leukocytosis (increased blood leukocytes); kidney damage; [potential occupational carcinogen]
Target Organs Skin, liver, kidneys, central nervous system, gastrointestinal tract Cancer Site [in animals: liver tumors]
See also: INTRODUCTION