# NIOSH Pocket Guide to Chemical Hazards
Bromoform | CAS 75-25-2
CHBr3 | RTECS PB5600000
Synonyms & Trade Names Methyl tribromide, Tribromomethane | DOT ID & Guide 2515 159
Exposure Limits | NIOSH REL: TWA 0.5 ppm (5 mg/m3) [skin]
OSHA PEL: TWA 0.5 ppm (5 mg/m3) [skin]
IDLH 850 ppm | Conversion 1 ppm = 10.34 mg/m3
Physical Description Colorless to yellow liquid with a chloroform-like odor. [Note: A solid below 47°F.]
MW: 252.8 | BP: 301°F | FRZ: 47°F | Sol: 0.1%
VP: 5 mmHg | IP: 10.48 eV |  | Sp.Gr: 2.89
Fl.P: NA | UEL: NA | LEL: 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.]
Measurement Methods NIOSH 1003; OSHA 7
Personal Protection & Sanitation 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
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
See also: INTRODUCTION