PCB Accumulation in the Canadian Arctic Origin, Composition, Uses Polychlorinated Biphenyls (PCB) are part of a large family of artificial organic chemicals known as the chlorinated hydrocarbons. They were first commercially manufactured from 1929 until the late 1970s, when their production was gradually banned in various countries (EPA, para. 1; Faroon, et al., 1.2). PCBs constitute a combination of chlorinated biphenyl chemicals which actually make up over 200 individual compounds or congeners. Prior to their ban, these compounds were manufactured and distributed in various countries under different trade names but their essential chemical content was similar. Chemically, PCBs consist of a pair of benzene rings joined by a single...The end:
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