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What is meant by PCB - polychlorinated biphenyls?

In: Chemistry, Environmental Issues [Edit categories]

Answer:

Polychlorinated biphenyls (PCBs) are a class of organic compounds with 1 to 10 chlorine atoms attached to biphenyl which is a molecule composed of two benzene rings each containing six carbon atoms. The chemical formula for all PCBs is C₁₂H_10-xCl_x.

PCBs were used as coolants and insulating fluids for transformers and capacitors, stabilizing additives in flexible PVC coatings of electrical wiring and electronic components, pesticide extenders, cutting oils, flame retardants, hydraulic fluids, sealants (used in caulking, etc), adhesives, wood floor finishes,^[1] paints, de-dusting agents, and in carbonless copy paper.^[2]

PCB production was banned in the 1970s due to the high toxicity of most PCB congeners and mixtures. PCBs are classified as persistent organic pollutants which bioaccumulate in animals.

First answer by Kingto0609. Last edit by Kingto0609. Contributor trust: 4 [recommend contributor ]. Question popularity: 5 [recommend question].

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