Bromine At 25 o C, bromine is a dense, freely flowing, corrosive, dark red liquid that is easily vaporized into a brownish-red vapor. 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. The PbBr 2 escapes into the atmosphere and prevents buildup of nonvolatile lead compounds inside engines. Although this ultimately makes car engines run smoothly, it poses a serious health hazard in the environment.