Definition - What does Hexavalent Chromium mean?
Hexavalent chromium is one of the various valence states of the chemical element chromium. It possesses a valence charge of +6; is usually produced as a byproduct of industrial processes; and causes significant health concerns such as cancer, respiratory problems and several others.
Corrosionpedia explains Hexavalent Chromium
Chromium is a natural metal that is present mostly in the trivalent (+3) or hexavalent (+6) forms. It is present in small amounts throughout the environment. Hexavalent chromium is released into the environment due to industrial processes, fossil fuel combustion, refining, smelting and other processes. The release of hexavalent chromium is closely monitored and regulated due to its severe health implications for humans.