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.

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 It might be outdated or ideologically biased.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).

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References in periodicals archive

Wolff (1992), "Pesticides and Polychiorinated Biphenyl Residues in Human Breast Lipids and Their Relations to Breast Cancer," Archives of Environmental Health, 47(1):143-146.

Levels of Polychlorinated Biphenyls (PCBs) in Fish: The Influence on Local Decision Making About Fish Consumption

An Indiana capacitor-manufacturing cohort (n = 3,569) was exposed to polychlorinated biphenyls (PCBs) from 1957 to 1977.

Mortality among workers exposed to polychlorinated biphenyls (PCBs) in an electrical capacitor manufacturing plant in Indiana: an update

Ganey and Boyd (2005) used the bioremediation of polychlorinated biphenyls (PCBs) as an example, which was an excellent choice.

Bioremediation monitoring

(2002) have shown that Flemish adolescents exposed to polychlorinated biphenyls (PCBs) and dioxins are more susceptible to infectious diseases.

Risk-based consumption advice for farmed Atlantic and wild Pacific Salmon contaminated with dioxins and dioxin-like compounds

Aroclors were evaluated at concentrations ranging from 0.04 to 2.5 [micro]g/well (250 [micro]L/well), and the dechlorination products were used at molar equivalent concentrations based on biphenyl concentration (biphenyl concentration is unaffected by dechlorination).

An approach to evaluation of the effect of bioremediation on biological activity of environmental contaminants: dechlorination of polychlorinated biphenyls

Keywords: Thin film, Biphenyl (E7), Polarizing Optical Technique, Beer-Lambert's Law.

Surface Behavior and Thickness Measurement of Free Standing Thin Film of Liquid Crystal Compound Biphenyl (E7)

Keywords: Biphenyl analogues, brine shrimp lethal bioassay, etoposide, cytotoxic

BRINE-SHRIMP LETHALITY BIOASSAY AND ANTIBACTERIAL ACTIVITY OF BIPHENYL ANALOGUES

Chiral biphenyl dopants, conformationally restricted (1-8) and unrestricted (9-19) biphenyl core were investigated by using DFT studies, the computed data of dipole moment () and dihedral angle between two phenyl rings (Fig.

DFT Studies of Biphenyl Derivatives, Potential Application as Chiral Dopants for Liquid Crystals

Polychlorinated biphenyls, polybrominated diphenyl ethers, polybrominated biphenyls, phthalates, bisphenol-A and halogens such as fluoride, bromide and iodide can bind to thyroid hormone receptors and exert negative effects.

Thyroid disrupting chemicals

In utero polychlorinated biphenyl exposures in relation to fetal and early childhood growth.

To breastfeed or not to breastfeed: a review of the impact of lactational exposure to polychlorinated biphenyls (PCBs) on infants

There is increasing global concern regarding the utilisation and discharge of polychlorinated biphenyl (PCB) compounds into the environment.

Photolysis of Pcbs (oil transformer) by Uvc in presence of solvent and oxidizing agents