NIOSH Pocket Guide to Chemical Hazards

Acetylene tetrabromide

CAS 79-27-6


RTECS KI8225000
Synonyms & Trade Names
Symmetrical tetrabromoethane; TBE; Tetrabromoacetylene; Tetrabromoethane; 1,1,2,2-Tetrabromoethane
DOT ID & Guide
2504 159


NIOSH REL: See Appendix D
OSHA PEL: TWA 1 ppm (14 mg/m3)
IDLH 8 ppm See: 79276 Conversion 1 ppm = 14.14 mg/m3
Physical Description
Pale-yellow liquid with a pungent odor similar to camphor or iodoform. [Note: A solid below 32°F.]
MW: 345.7
BP: 474°F (Decomposes)
FRZ: 32°F
Sol: 0.07%
VP: 0.02 mmHg
IP: ?

Sp.Gr: 2.97
Fl.P: NA

Noncombustible Liquid
Incompatibilities & Reactivities
Strong caustics; hot iron; reducing metals such as aluminum, magnesium & zinc
Measurement Methods
NIOSH 2003
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

First Aid (See procedures)
Eye: Irrigate immediately
Skin: Water flush promptly
Breathing: Respiratory support
Swallow: Medical attention immediately
Important additional information about respirator selection
Respirator Recommendations OSHA
Up to 8 ppm:
(APF = 10) Any supplied-air respirator
(APF = 50) Any self-contained breathing apparatus with a full facepiece
Emergency or planned entry into unknown concentrations or IDLH conditions:
(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, ingestion, skin and/or eye contact
Symptoms Irritation eyes, nose; anorexia, nausea; headache; abdominal pain; jaundice; leukocytosis (increased blood leukocytes); central nervous system depression
Target Organs Eyes, respiratory system, liver, central nervous system
See also: INTRODUCTION   See ICSC CARD: 1235   See MEDICAL TESTS: 0005