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Bromine

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Synonyms & Trade Names
Molecular bromine
CAS No.
7726-95-6
RTECS No.
EF9100000
DOT ID & Guide
1744 154
Formula
Br₂
Conversion
1 ppm = 6.54 mg/m3
IDLH
3 ppm
See: 7726956
Exposure Limits
NIOSH REL
TWA 0.1 ppm (0.7 mg/m3) ST 0.3 ppm (2 mg/m3)
OSHA PEL
TWA 0.1 ppm (0.7 mg/m3) See Appendix G
Measurement Methods
NIOSH 6011;
OSHA ID108
See: NMAM or OSHA Methods
Physical Description
Dark reddish-brown, fuming liquid with suffocating, irritating fumes.
Molecular Weight
159.8
Boiling Point
139°F
Freezing Point
19°F
Solubility
4%
Vapor Pressure
172 mmHg
Ionization Potential
10.55 eV
Specific Gravity
3.12
Flash Point
NA
Upper Explosive Limit
NA
Lower Explosive Limit
NA
Noncombustible Liquid, but accelerates the burning of combustibles.
Incompatibilities & Reactivities
Combustible organics (sawdust, wood, cotton, straw, etc.), aluminum, readily oxidizable materials, ammonia, hydrogen, acetylene, phosphorus, potassium, sodium [Note: Corrodes iron, steel, stainless steel & copper.]
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
dizziness, headache; lacrimation (discharge of tears), epistaxis (nosebleed); cough, feeling of oppression, pulmonary edema, pneumonitis; abdominal pain, diarrhea; measle-like eruptions; eye, skin burns
Target Organs
respiratory system, eyes, central nervous system, skin
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
Provide:Eyewash, Quick drench
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Soap wash immediately
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH/OSHA

Up to 2.5 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode£
(APF = 25) Any powered, air-purifying respirator with cartridge(s) providing protection against the compound of concern¿£

Up to 3 ppm:
(APF = 50) Any chemical cartridge respirator with a full facepiece and cartridge(s) providing protection against the compound of concern¿
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern¿
(APF = 50) Any powered, air-purifying respirator with a tight-fitting facepiece and cartridge(s) providing protection against the compound of concern¿£
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator 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 canister providing protection against the compound of concern¿
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 0107   MEDICAL TESTS: 0028
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health