Biphenyl

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Related to biphenyls: Polybrominated biphenyls, Aroclor

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.

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).

References in periodicals archive ?
3First example of chiral dopant containing biphenyl core was reported by.
The project, led by the Ministry of Environment and Sustainable Development, will achieve this goal by implementing environmental management systems of polychlorinated biphenyls in the energy sector stakeholders and strengthen the structure of provincial environmental authorities to ensure control and compliance Plan.
Search terms included "polychlorinated biphenyls (PCBs) and routes of exposure," "PCBs and infant outcomes," "PCBs and breastfeeding," "PCBs and infant growth," "PCBs and infant development," and "adverse effects of PCBs in children.
The production of polychlorinated biphenyls (PCBs) was banned worldwide by 1977, but the chemicals linger in the environment at hazardous waste sites, in contaminated fish and food supplies, and in old appliances.
RM 8504, Transformer Oil, is intended to be used as a diluent oil with transformer oil Standard Reference Materials (SRMs) 3075 to 3080 and SRM 3090 [1] when developing and validating methods for the determination of polychlorinated biphenyls (PCBs) as Aroclors (1) in transformer oil or similar matrices.
Burkholderia xenovarans (strain LB400) is a bacterium found in soil that has the ability to degrade polychlorinated biphenyls and other contaminants.
The State of Wisconsin Department of Natural Resources (W-DNR), Madison, Wisconsin, USA says the long-awaited cleanup of polychlorinated biphenyls (PCB) began the week of September 13 at two of Wisconsin's worst PCB contamination sites, while work at third site moved into a critical phase during the same period.
In the final part, there are chapters summarising a wide range of other chemical residues in food, from xenoestrogens/endocrine disruptors and dietary estrogens to polycyclic aromatic hydrocarbons, dioxins and polychlorinated biphenyls.
The US government banned PCBs, or polychlorinated biphenyls, in 1979.
Polychlorinated biphenyls (PCBs) are manmade chemicals and well-known contaminants prevalent in both terrestrial and aquatic ecosystems.
It is valuable in determining levels of polychlorinated biphenyls in groundwater samples and facilitates the assay of many recycled organics and other materials such as pesticides, pharmaceuticals, polymers, and hydrocarbons.
This (Research Triangle Institute) report presents a toxicological profile of polychlorinated biphenyls (PCBs).