Hydrogen Bromide is the diatomic molecule HBr. HBr is a gas at standard conditions. Hydrobromic acid forms upon dissolving HBr in water. Conversely, HBr can be liberated from hydrobromic acid solutions with the addition of a dehydration agent, but not by distillation.
At room temperature, HBr is a nonflammable gas with an acrid odor, fuming in moist air because of the formation of hydrobromic acid. HBr is very soluble in water, forming hydrobromic acid solution, which is saturated at 68.85%. Aqueous solutions that are 47.38% HBr by weight form a constant-boiling mixture that boils at 126°C.
There are many uses of HBr in chemical synthesis. For example, HBr is used for the production of alkyl bromides from alcohols.
Hydrogen is an element with an atomic number of 1. It is the lightest and most abundant chemical element. Bromine has an atomic number of 35 and an atomic mass of 79.904.
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