referred to by the trade names Aroclor, Phenoclor and Kanechlor,
encompass a class of chlorinated compounds that includes up
to 209 variations, or congeners, with different physical and
chemical characteristics. Most PCBs are oily liquids whose color
darkens and viscosity increases with rising chlorine content.
of the stability of PCBs, many exposure routes must be considered:
dermal exposure, ingestion of PCB-contaminated soil, water and
food; and inhalation of ambient air contaminated with PCB.