Bromine

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

Vapor Pressure

172 mmHg

Ionization Potential

10.55 eV

Specific Gravity

3.12

Flash Point

Upper Explosive Limit

Lower Explosive Limit

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

Bromine

NIOSH REL

OSHA PEL

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