Occurrence and production thumb|View of salt evaporation pans on the Dead Sea, where Jordan (right) and Israel (left) produce salt and bromine Bromine is significantly less abundant in the crust than fluorine or chlorine, comprising only 2.5 parts per million of the Earth's crustal rocks, and then only as bromide salts. It is the 46th most abundant element in Earth's crust. It is significantly more abundant in the oceans, resulting from long-term leaching. There, it makes up 65 parts per million, corresponding to a ratio of about one bromine atom for every 660 chlorine atoms. Salt lakes and brine wells may have higher bromine concentrations: for example, the Dead Sea contains 0.4% bromide ions.Greenwood and Earnshaw, pp. 795–6 It is from these sources that bromine extraction is mostly economically feasible. Bromine is the tenth most abundant element in seawater.
Occurrence and production thumb|View of salt evaporation pans on the Dead Sea, where Jordan (right) and Israel (left) produce salt and bromine Bromine is significantly less abundant in the crust than fluorine or chlorine, comprising only 2.5 parts per million of the Earth's crustal rocks, and then only as bromide salts. It is the 46th most abundant element in Earth's crust. It is significantly more abundant in the oceans, resulting from long-term leaching. There, it makes up 65 parts per million, corresponding to a ratio of about one bromine atom for every 660 chlorine atoms. Salt lakes and brine wells may have higher bromine concentrations: for example, the Dead Sea contains 0.4% bromide ions.Greenwood and Earnshaw, pp. 795–6 It is from these sources that bromine extraction is mostly economically feasible. Bromine is the tenth most abundant element in seawater