Octachlorostyrene is a persistent, bioacculumative, and toxic (PBT) pollutants target by EPA. Formed when graphite anodes are used during electrolytic production of magnesium from magnesium chloride.
A toxic substance and critical pollutant that is a by-product of high temperature industrial processes involving chlorine. Like dioxin, OCS is not produced intentionally. Release to the environment occurs in effluent from chlorine and gas production, aluminum smelting, and other metal production. OCS has been found in leachate from industrial landfills and fly ash from waste incinerators.