Bromine

Bromine is one of only two elements that are liquid at room temperature; the other is mercury. It is a heavy, dark red-brown liquid that gives off choking orange fumes, and its name comes from the Greek for stench. It is extracted from salty brines, especially around the Dead Sea and in Arkansas.

Its biggest use is in flame retardants. In the television, bromine compounds built into the epoxy of FR-4 laminate circuit board laminate help it resist catching fire. Bromine atoms on copper phthalocyanine also shift its color from blue toward a yellowish green in the green pigment of the color filter.