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polybrominated biphenyl (PBB) any of various brominated derivatives of biphenyl; uses and toxic hazards are similar to those of polychlorinated biphenyls. They typically are deposited in body fat stores and are rarely mobilized except through lactation.
polychlorinated biphenyl (PCB) any of various chlorinated derivatives of biphenyl, toxic and carcinogenic nonbiodegradable compounds used as heat-transfer agents and electrical insulators; they are readily absorbed from the gastrointestinal tract, and those with a lower percentage of chlorine are associated with a higher toxicity but are more readily excreted.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


Colorless liquid; used as heat transfer agent, frequently as polychlorinated biphenyls (PCBs); as fungistat for oranges (applied to inside of shipping container or wrappers); and in organic syntheses. Produces convulsions and central nervous system depression.
Synonym(s): biphenyl, phenylbenzene
Farlex Partner Medical Dictionary © Farlex 2012


Colorless liquid that is used as a heat transfer agent, frequently as a polychlorinated biphenyl (PCB); used as fungistat for oranges and in organic syntheses. Produces convulsions and central nervous system depression.
Synonym(s): biphenyl, phenylbenzene.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Methylene Diphenyl Diisocyanate Market Analysis by Players: This report includes following top vendors in terms of company basic information, product category, sales (volume), revenue (Million USD), price and gross margin (%).
Rauch et al., "In utero and childhood polybrominated diphenyl ether (PBDE) exposures and neurodevelopment in the CHAMACOS study," Environmental Health Perspectives, vol.
* Obtain up-to-date information on Taiwan's Methylene Diphenyl Diisocyanate (MDI) industry
However, when methanol was used as the organic solvent, its sorption strength decreased as the stationary phase changed from diphenyl to C3 to CN to C8 and its chromatographic behaviour was similar to that of cytochrome c on all used stationary phases.
Addison, "Exponential increases of the brominated flame retardants, polybrominated diphenyl ethers, in the Canadian Arctic from 1981 to 2000," Environmental Science and Technology, vol.
Annex II of the directive sets the maximum limits tolerated by weight: lead (0,1%), mercury (0,1%), cadmium (0,01%), hexavalent chromium (0,1%), polybrominated biphenyls (PBB - 0,1%), polybrominated diphenyl ethers (PBDE - 0,1%).
Although not often studied, polybrominated diphenyl ethers (PBDEs) have made it into the headlines recently due to serious health concerns.
The range includes 17 new compounds which are all halogen, chlorine and antimony free, low smoke and are compliant with the Restriction of Hazardous Substances directives; offering flame retardancy without the use of polybrominated diphenyl ether (PBDE).
Following its 2006 declaration that a family of flame retardants known as Polybrominated Diphenyl Ethers (PBDEs) is toxic, the Harper government banned their manufacture, use and import in 2008.
As a result, Pilot now offers the following products: sulfonate AA10 sodium dodecylbenzene sulfonate (branched alkyl chain); SADPO sulfonated alkyl diphenyl oxide, sodium salt; sulfonate OA-5R sulfonated oleic acid, sodium salt; sulfonic 800 sulfonated oleic acid; sulfonate OE-500 sulfonated oleic acid, N-amylester, sodium salt; PTSA para toluene sulfonie Acid--anhydrous; PTSA 65% para toluene sulfonic acid.
Products: Pure and polymeric methylene diphenyl diisocyanate (MDI)