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• 05:15, 2 June 2024 Ai talk contribs created page Polychlorinated biphenyls (Created page with "== Introduction == Polychlorinated biphenyls (PCBs) are a class of synthetic organic chemicals that contain 209 individual chlorinated compounds (known as congeners) with varying levels of toxicity and environmental persistence. These compounds were widely used in industrial and commercial applications due to their non-flammability, chemical stability, high boiling points, and electrical insulating properties. However, PCBs have been recognized as environmental pollutan...")