Chemical structure of PCBs. The possible positions of chlorine atoms on the benzene rings are denoted by numbers assigned to the carbon atoms.

Polychlorinated biphenyls are mixtures of up to 209 individual chlorinated compounds (known as congeners). There are no known natural sources of PCBs. PCBs are either oily liquids or solids that are colorless to light yellow. Some PCBs can exist …

Mar 28, 2025 · PCBs are a group of man-made organic chemicals consisting of carbon, hydrogen and chlorine atoms. The number of chlorine atoms and their location in a PCB molecule determine many of its physical and chemical properties. PCBs have no known taste or smell, and range in consistency from an oil to a waxy solid.

Mar 1, 2025 · Polychlorinated biphenyl (PCB), any of a class of organohalogen compounds prepared by the reaction of chlorine with biphenyl. A typical mixture of PCBs may contain over 100 compounds and is a colourless, viscous liquid.

Chemical structure of Polychlorinated Biphenyls (PCBs) PCBs also bioaccumulate in the food chain ( Ivanciuc et al., 2006 ). Because of stability and lipophilicity, PCBs preferentially bioaccumulate in fatty tissues.

The general chemical structure of chlorinated biphenyls is shown below. It can be seen from the structure that a large number of chlorinated compounds are possible. The 209 possible compounds are called congeners. PCBs can also be categorized by degree of chlorination.

The general chemical structure of chlorinated biphenyls is shown below. It can be seen from the structure that a large number of chlorinated compounds are possible. The 209 possible compounds are called congeners. PCBs can also be categorized by degree of chlorination.

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 C 12 H 10-x Cl x.

Polychlorinated biphenyls (PCBs) are a group of industrial chemicals that have not been found to occur naturally. The generic structure of PCBs is shown in Figure 1, and consists of biphenyl chlorinated in one or more positions.

Basic PCB structure PCBs consist of a biphenyl (two benzene rings with a carbon to carbon bond between carbon 1 on one ring and carbon 1' on the second ring) with a varying number of chlorines. Chlorines can be attached to any of the carbons by removing the hydrogen from that carbon and substituting the chorine in its place.