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Acetylene tetrabromide

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Synonyms & Trade Names
Symmetrical tetrabromoethane, TBE, Tetrabromoacetylene, 1,1,2,2-Tetrabromoethane, Tetrabromoethane
CAS No.
79-27-6
RTECS No.
KI8225000
DOT ID & Guide
2504 159
Formula
CHBr₂CHBr₂
Conversion
1 ppm = 14.14 mg/m3
IDLH
8 ppm
See: 79276
Exposure Limits
NIOSH REL
See Appendix D
OSHA PEL
TWA 1 ppm (14 mg/m3)
Measurement Methods
NIOSH 2003
See: NMAM or OSHA Methods
Physical Description
Pale-yellow liquid with a pungent odor similar to camphor or iodoform. [Note: A solid below 32°F.]
Molecular Weight
345.7
Boiling Point
474°F (Decomposes)
Freezing Point
32°F
Solubility
0.07%
Vapor Pressure
0.02 mmHg
Ionization Potential
?
Specific Gravity
2.97
Flash Point
NA
Upper Explosive Limit
NA
Lower Explosive Limit
NA
Noncombustible Liquid
Incompatibilities & Reactivities
Strong caustics; hot iron; reducing metals such as aluminum, magnesium & zinc
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
Personal Protection/Sanitation
(See protection codes)
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
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

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

See also
INTRODUCTION   ICSC CARD: 1235   MEDICAL TESTS: 0005
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health