What is Hexachlorobenzene (HCB)?
Hexachlorobenzene which has the molecular formula of C6Cl6 and a CAS number of 118-74-1 is an organic compound comprising at least one covalently bonded atom of chlorine. It has a white color and the form of crystal-clear solid at room temperature. HCB was mainly used as a pesticide for seed treatment and has been banned worldwide under the Stockholm Convention on POP. It is part of the substances listed in Annex I to EU Regulation 2019/1021. Therefore, HCB is prohibited on its own, in mixtures, or articles like any other substances listed in Annex I.