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polychlorinated biphenyl
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polychlorinated biphenyl

Any of a group of chlorinated isomers of biphenyl (C6H5)2. They are dangerous industrial chemicals, valuable for their fire-resistant qualities. They constitute an environmental hazard because of their persistent toxicity. Since 1973 their use had been limited by international agreement. In December 2000, 122 nations agreed a treaty to ban the toxic chemicals known as persistent organic polluters (POPs), which include PCBs, although they are unlikely to be totally eliminated until about 2025.



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? Mentioned in ? References in periodicals archive
 
[28] Certificate of Analysis, SRM 2262, Chlorinated Biphenyl Congeners in 2,2,4-Trimethylpentane (Nominal Concentration 2 microgram/milliliter), Certificate of Analysis, National Institute of Standards and Technology, Gaithersburg, MD (1995), www.
Standard Reference Materials (SRMs) for the calibration and ... by Wise, Stephen A. / Journal of Research of the National Institute of Standards and Technology
They comprise mixtures of distinct chlorinated biphenyls referred to as congeners.
Levels of Polychlorinated Biphenyls (PCBs) in Fish: The Influence on ... by Bisesi, Michael S. / Journal of Environmental Health
Aroclor 1254 is the trade name for a mixture of chlorinated biphenyls with average chlorine content of 54%.
An unrecognized source of PCB contamination in schools and other ... by Weymouth, George A. / Environmental Health Perspectives
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