Biphenyl

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biphenyl

[bī′fen·əl]
(organic chemistry)
C12H10 A white or slightly yellow crystalline hydrocarbon, melting point 70.0°C, boiling point 255.9°C, and density 1.9896, which gives plates or monoclinic prismatic crystals; used as a heat-transfer medium and as a raw material for chlorinated diphenyls. Also known as diphenyl; phenylbenzene.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Biphenyl

 

C6H5—C6H5; colorless crystals. Melting point, 71°C; boiling point, 254°-255°C. It is insoluble in water and readily soluble in organic solvents. It is present in the anthracene oil produced from coal tar. It is prepared industrially by dehydrogenation of benzene at 750°–800°C.

Biphenyl is an intermediate in the production of some dyes; mixed with phenyl ether (73.5 percent), it is used as a high-temperature heat carrier (so-called Dowtherm).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The dipole moment of biphenyl compound 3 having thiol functional group at 4(4?) instead of hydroxyl was 5.52 D and dihedral angle between the two rings (C2-C1-C1?-C2?) was 57.0o.
Extensive chemical manufacturing in Chapaevsk, Russia, has resulted in high environmental contamination with dioxins, furans, and poly-chlorinated biphenyl compounds (PCBs).
In a letter to parents on Wednesday, Sherwood Principal Jane Lizotte said: "The good news is, that while PCBs (polychlorinated biphenyl compounds) were detected at low levels at SMS, the (state Bureau of Environmental Health, a division of the state Department of Public Health) does not believe that exposure to PCBs at these low levels present any health concerns for students and/or teachers in the short or long term.