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Bromoform

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Synonyms & Trade Names
Methyl tribromide, Tribromomethane
CAS No.
75-25-2
RTECS No.
PB5600000
DOT ID & Guide
2515 159
Formula
CHBr₃
Conversion
1 ppm = 10.34 mg/m3
IDLH
850 ppm
See: 75252
Exposure Limits
NIOSH REL
TWA 0.5 ppm (5 mg/m3) [skin]
OSHA PEL
TWA 0.5 ppm (5 mg/m3) [skin]
Measurement Methods
NIOSH 1003;
OSHA 7
See: NMAM or OSHA Methods
Physical Description
Colorless to yellow liquid with a chloroform-like odor. [Note: A solid below 47°F.]
Molecular Weight
252.8
Boiling Point
301°F
Freezing Point
47°F
Solubility
0.1%
Vapor Pressure
5 mmHg
Ionization Potential
10.48 eV
Specific Gravity
2.89
Flash Point
NA
Upper Explosive Limit
NA
Lower Explosive Limit
NA
Noncombustible Liquid
Incompatibilities & Reactivities
Lithium, sodium, potassium, calcium, aluminum, zinc, magnesium, strong caustics, acetone [Note: Gradually decomposes, acquiring yellow color; air & light accelerate decomposition.]
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, respiratory system; central nervous system depression; liver, kidney damage
Target Organs
Eyes, skin, respiratory system, central nervous system, liver, kidneys
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:Soap wash promptly
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH/OSHA

Up to 12.5 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode£
(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)£

Up to 25 ppm:
(APF = 50) Any chemical cartridge respirator with a full facepiece and organic vapor cartridge(s)
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister
(APF = 50) Any powered, air-purifying respirator with a tight-fitting facepiece and organic vapor cartridge(s)£
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece

Up to 850 ppm:
(APF = 2000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode

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: 0108
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health