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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
 
Abnormally high polychlorinated biphenyl levels in striped dolphins (Stenella coeruleoalba) affected by the 1990-1992 Mediterranean epizootic.
The risk of infection from polychlorinated biphenyl exposure in the ... by Jepson, Paul D. / Environmental Health Perspectives
Individual congeners are produced by reacting the basic biphenyl structural unit with chlorine, replacing anywhere from 1 to 10 of the original hydrogens with chlorine yielding up to 209 possible arrangements (congeners).
Standard Reference Materials (SRMs) for the calibration and ... by Wise, Stephen A. / Journal of Research of the National Institute of Standards and Technology
If the "pro-lifers" are so concerned about the health of fetuses, why aren't they out in the streets protesting and demanding that the Bush Administration do something about heavy metal and polychlorinated biphenyl (PCB) pollution in our lakes, rivers and oceans?
A mercurial debate. (Letters From Our Readers) by E
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