Hydrogen Bromide


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hydrogen bromide

[′hī·drə·jən ′brō‚mīd]
(inorganic chemistry)
HBr A hazardous, toxic gas used as a chemical intermediate and as an alkylation catalyst; forms hydrobromic acid in aqueous solution.

Hydrogen Bromide

 

(HBr), a compound of hydrogen and bromine. It is a colorless gas with a sharp odor and acidic taste; Tb = -68.7° C, Tm = -87.9° C. At 10° C approximately 350 volumes of hydrogen bromide dissolves in 1 volume of water. An aqueous solution of hydrogen bromide is called hydrobromic acid. This is a colorless liquid (sometimes yellowish owing to the presence of traces of bromine) with a sharp odor. An azeotropic mixture with a boiling point of 124.3° C forms at a concentration of 47.6 percent HBr.

Hydrobromic acid is one of the strongest mineral acids. In industry hydrogen bromide is obtained by the reaction of bromine vapors with hydrogen at a high temperature. The reaction temperature can be reduced by using a catalyst, activated charcoal, or platinized asbestos. Hydrogen bromide can be obtained in the laboratory by treating bromides with 50-percent sulfuric acid (more concentrated acid partially oxidizes HBr to Br2) and by other methods. Hydrogen bromide is used to obtain bromides and organic bromine derivatives and for other purposes.

References in periodicals archive ?
LIST OF TABLES TABLE 1 BROMINE MARKET SIZE, BY DERIVATIVES, 2011-2018 (TONS) 24 TABLE 2 BROMINE DERIVATIVES MARKET SIZE, 2011-2018 (TONS) 26 TABLE 3 BROMINE: CONCENTRATION BY SOURCE (G/L) 36 TABLE 4 ORGANOBROMINES MARKET SIZE, 2011-2018 66 TABLE 5 CLEAR BRINE FLUIDS MARKET SIZE, 2011-2018 67 TABLE 6 HYDROGEN BROMIDE MARKET SIZE, 2011-2018 68 TABLE 7 NORTH AMERICA: MARKET SIZE, BY DERIVATIVES, 2011-2018 (TONS) 71 TABLE 8 NORTH AMERICA: MARKET SIZE, BY DERIVATIVES, 2011-2018 ($MILLION) 72 TABLE 9 U.
The gases affected include ammonia, arsine, boron trifluoride, chlorine, ethylene oxide, cyanides, diborane, fluorine, hydrogen bromide, hydrogen chloride, hydrogen fluoride, hydrogen sulfide, phosphine and sulfur dioxide.