NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

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] See: 79345
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, 2562; OSHA 7
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
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
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
Important additional information about respirator selection
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   See ICSC CARD: 0332   See MEDICAL TESTS: 0222