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) |
FormulaHBr |
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 |
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Fl.P: NA |
UEL: NA |
LEL: NA |
RGasD: 2.81 |
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| 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 |
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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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