Hydrogen bromide
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CAS
10035-10-6
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HBr
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RTECS
MW3850000
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Synonyms & Trade Names
Anhydrous hydrogen bromide; Aqueous hydrogen bromide (i.e., Hydrobromic acid)
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DOT ID & Guide
1048 / 125 (anhydrous)
1788 / 154 (solution)
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Exposure
Limits
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NIOSH REL: C 3 ppm (10 mg/m3)
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OSHA PEL†: TWA 3 ppm (10 mg/m3)
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IDLH
30 ppm
See: 10035106
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Conversion
1 ppm = 3.31 mg/m3
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Physical Description
Colorless gas with a sharp, irritating odor. [Note: Shipped as a liquefied compressed gas. Often used in an aqueous solution.]
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MW: 80.9
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BP: -88°F
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FRZ: -124°F
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Sol: 49%
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VP: 20 atm
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IP: 11.62 eV
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RGasD: 2.81
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Fl.P: NA
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UEL: NA
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LEL: NA
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Nonflammable Gas
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Incompatibilities & Reactivities
Strong oxidizers, strong caustics, moisture, copper, brass, zinc [Note: Hydrobromic acid is highly corrosive to most metals.]
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Measurement Methods
NIOSH 7903; OSHA ID165SG
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
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
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First Aid (See procedures)
Eye: Irrigate immediately (solution)/Frostbite
Skin: Water flush immediately (solution)/Frostbite
Breathing: Respiratory support
Swallow: Medical attention immediately (solution)
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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
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Exposure Routes
inhalation, ingestion (solution), skin and/or eye contact
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Symptoms
Irritation eyes, skin, nose, throat; solution: eye, skin burns; liquid: frostbite
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Target Organs
Eyes, skin, respiratory system
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See also: INTRODUCTION
See ICSC CARD: 0282 |
