NIOSH Pocket Guide to Chemical Hazards


CAS 79-34-5


RTECS KI8575000
Synonyms & Trade Names
Acetylene tetrachloride, Symmetrical tetrachloroethane
DOT ID & Guide
1702 151


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

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
Important additional information about respirator selection
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
(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   See ICSC CARD: 0332   See MEDICAL TESTS: 0222