Hydrogen bromide (HBr)

Hydrogen bromide (HBr)

One of the hydrogen halides, it is used for the production of alkyl bromides.



hydrogen bromide, hydrogen halide, molecule, polar, covalent bond, sigma bond, toxic, inorganic, general chemistry, chemistry

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Hydrogen bromide HBr


Molar mass: 80.92 g/mol

Melting point: -88.6 °C (-127.48 °F)

Boiling point: -67 °C (-88.6 °F)

Relative steam density (air=1): 2.8


Hydrogen bromide is a colorless, heavier-than-air, toxic gas with an acrid odor. It is soluble in water, and its aqueous solution is a strong acid. Its chemical behavior is similar to hydrochloric acid: it reacts with metals, their oxides, hydroxides and carbonates. Its salts are called bromides.

Occurrence and production

Hydrogen bromide is produced in a reaction of hydrogen and bromine in the presence of a catalyst or in a reaction of hydrogen sulfide and bromine.


It is used in industrial quantities in the production of inorganic bromides and alkyl bromides.

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Comparison of hydrogen halides

Atoms within hydrogen halides are bound by covalent bonds, forming polar molecules.

Bromine (Br₂)

One of the halogens, it may cause skin irritation.

Hydrogen (H₂)

Colorless, odorless, lighter-than-air gas. The most common chemical element in the universe.

Hydrogen chloride (HCl)

A colorless gas with a pungent odor, its solution in water is called hydrochloric acid.

Hydrogen-fluoride (HF)

One of the hydrogen halides, a highly aggressive substance - it even attacks glass.

Hydrogen-iodide (HI)

A colorless, heavier-than-air gas with a pungent odor.

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