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Hydrogen bromide

Synonyms & Trade Names
Anhydrous hydrogen bromide; Aqueous hydrogen bromide (i.e., Hydrobromic acid)
CAS No.
10035-10-6
RTECS No.
MW3850000
DOT ID & Guide
1048 125 (anhydrous)
1788 154 (solution)
Formula
HBr
Conversion
1 ppm = 3.31 mg/m3
IDLH
30 ppm
See: 10035106
Exposure Limits
NIOSH REL
: C 3 ppm (10 mg/m3)
OSHA PEL
†: TWA 3 ppm (10 mg/m3)
Measurement Methods

NIOSH 7903;
OSHA ID165SG
See: NMAM or OSHA Methods
Physical Description
Colorless gas with a sharp, irritating odor. [Note: Shipped as a liquefied compressed gas. Often used in an aqueous solution.]
MW:
80.9
BP:
-88°F
FRZ:
-124°F
Sol:
49%
VP:
20 atm
IP:
11.62 eV
Fl.P:
NA
UEL:
NA
LEL:
NA
RGasD:
2.81
Nonflammable Gas
Incompatibilities & Reactivities
Strong oxidizers, strong caustics, moisture, copper, brass, zinc [Note: Hydrobromic acid is highly corrosive to most metals.]
Exposure Routes
inhalation, ingestion (solution), skin and/or eye contact
Symptoms
irritation eyes, skin, nose, throat; solution: eye, skin burns; liquid: frostbite
Target Organs
Eyes, skin, respiratory system
Personal Protection/Sanitation
(See protection codes)
Skin: Prevent skin contact (solution)/Frostbite
Eyes: Prevent eye contact (solution)/Frostbite
Wash skin: When contaminated (solution)
Remove: When wet or contaminated (solution)
Change: No recommendation
Provide: Eyewash (liquid), Quick drench (solution), Frostbite wash
First Aid
(See procedures)
Eye: Irrigate immediately (solution)/Frostbite
Skin: Water flush immediately (solution)/Frostbite
Breathing: Respiratory support
Swallow: Medical attention immediately (solution)
Respirator Recommendations

NIOSH/OSHA

Up to 30 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode£
(APF = 25) Any powered, air-purifying respirator with acid gas cartridge(s)£
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted acid gas canister
(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 acid gas canister
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 0282
 

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