Hydrogen bromide
Synonyms & Trade Names
Anhydrous hydrogen bromide, Aqueous hydrogen bromidePhysical Description
Colorless gas with a sharp, irritating odor. [Note: Shipped as a liquefied compressed gas. Often used in an aqueous solution.]Molecular Weight
80.9Boiling Point
-88°FFreezing Point
-124°FSolubility
49%Vapor Pressure
20 atmIonization Potential
11.62 eVFlash Point
NAUpper Exposive Limit
NALower Explosive Limit
NARelative Gas Density
2.81Incompatibilities & 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 contactSymptoms
irritation eyes, skin, nose, throat; solution: eye, skin burns; liquid: frostbiteTarget Organs
Eyes, skin, respiratory systemPersonal 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
- Page last reviewed:April 11, 2016
- Page last updated:April 11, 2016
- Content source:
- National Institute for Occupational Safety and Health (NIOSH) Education and Information Division