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 (bī-fĕn′əl, -fē′nəl)
A white or colorless crystalline compound, C12H10, used as a heat-transfer agent, in fungicides, and in organic synthesis. Also called diphenyl.


(baɪˈfɛnəl; -ˈfiː-)
1. (Elements & Compounds) a white or colourless crystalline solid used as a heat-transfer agent, as a fungicide, as an antifungal food preservative (E230) on the skins of citrus fruit, and in the manufacture of dyes, etc. Formula: C6H5C6H5
2. (Elements & Compounds) any substituted derivative of biphenyl
Also called: diphenyl


(baɪˈfɛn l, -ˈfin l)

a water-insoluble powder, C12H10, from which benzidine dyes are derived: used chiefly as a heat-transfer agent and in organic synthesis.
References in periodicals archive ?
Project Description : Design and comprehensive Polychlorinated biphenyl management plan for Kazakhstan.
Age at menarche and tanner stage in girls exposed in utero and postnatally to polybrominated biphenyl.
Effects of a Non-Ortho-Substituted Polychiorinated Biphenyl Congener (3,3'4,4'-tetrachlorobiphenyl) on Sexual Maturation and Behavior in the Offspring of Female Rats.
The other fire training circle, located about 1,500 feet north of the Palmdale Regional Airport terminal, is earmarked for further study because field studies turned up evidence of pesticides and polychlorinated biphenyl, or PCB, in soil samples.
Aromatic polyimides having axially dissymmetric 2,2' bis(p-aminophenoxy) biphenyl units.
PCBs are a group of synthetic organic chemicals that contain 209 individual chlorinated biphenyl compounds (known as congeners) with varying harmful effects.
S Environmental Protection Agency (EPA) and the Wisconsin Department of Natural Resources (DNR) have together announced plans for the removal of polychlorinated biphenyl (PCB) contaminants in a 39-mile section of the lower Fox River.
RTP says the halogen and non-halogen formulations comply with the German Hazardous Substance Ordinance and meet the requirements of the latest draft of the EU WEEE/ROS Directive on recycling, which calls for the elimination of polybrominated biphenyl and diphenyl-ether flame retardants.
The detected chlorinated biphenyls were tetra-chlorinated biphenyl (at levels ranging from 0.
This Directive bans the placing on the EU market of new electrical and electronic equipment containing more than agreed levels of lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyl (PBB) and polybrominated diphenyl ether (PBDE) flame retardants.
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?
Commercial preparations contain few or no strictly coplanar PCB or polybrominated biphenyl congeners.