At 25 oC, bromine is a dense, freely flowing, corrosive, dark red liquid that is
easily vaporized into a brownish-red vapor. It was discovered in 1826 and it occurs mainly as
the bromide ion, Br-, in salts such as NaBr, KBr, MgBr2, and CaBr2 in
sea water, underground salt brines, and salt beds.
Bromine is prepared by bubbling chlorine through seawater, which
contains dissolved NaBr. Bromine vapor is blown out of the reaction vessel by a current of air and collected.
It takes about 2500 L of seawater to produce 160 g of bromine.
Bromine is used as a disinfectent. Uses of bromine-containing compounds include: