Biphenyl definition
Webbiphenyl, also called Diphenyl, an aromatic hydrocarbon, used alone or with diphenyl ether as a heat-transfer fluid; chemical formula, C6H5C6H5. It may be isolated from coal tar; in the United States, it is manufactured on a large scale by the thermal dehydrogenation of benzene. Biphenyl is slightly less reactive chemically than benzene. It is chlorinated … WebPolychlorinated biphenyl definition, PCB. See more. any of a group of compounds in which chlorine atoms replace the hydrogen atoms in biphenyl: used in industry in electrical insulators and in the manufacture of plastics; a toxic pollutant that can become concentrated in animal tissue Abbreviation: PCB
Biphenyl definition
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WebMar 20, 2024 · polychlorinated biphenyl (PCB), any of a class of organohalogen compounds prepared by the reaction of chlorine with biphenyl. A typical mixture of PCBs may contain over 100 compounds and is a colourless, viscous liquid. The mixture is relatively insoluble in water, is stable at high temperatures, and is a good dielectric … WebJan 17, 2024 · For the purposes of this paragraph, the term "polychlorinated biphenyls (PCB's)" is applicable to mixtures of chlorinated biphenyl compounds, irrespective of which mixture of PCB's is present as the residue. The temporary tolerances for residues of PCB's are as follows: (1) 1.5 parts per million in milk (fat basis).
WebDec 1, 2024 · Excluded manufacturing process means a manufacturing process in which quantities of PCBs, as determined in accordance with the definition of inadvertently generated PCBs, calculated as defined, and from which releases to products, air, and water meet the requirements of paragraphs (1) through (5) of this definition, or the importation … Webbiphenyl [bi-fen´il] diphenyl. 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 ...
WebBiphenyl definition: A white or colorless crystalline compound, C 12 H 10 , used as a heat-transfer agent, in fungicides, and in organic synthesis. Dictionary Thesaurus WebApr 12, 2024 · PCBs are a group of man-made organic chemicals consisting of carbon, hydrogen and chlorine atoms. The number of chlorine atoms and their location in a PCB molecule determine many of its physical and chemical properties. PCBs have no known taste or smell, and range in consistency from an oil to a waxy solid.
WebFeb 17, 2024 · : any of several compounds that are produced by replacing hydrogen atoms in biphenyl with chlorine, have various industrial applications, and are toxic …
WebNoun [ edit] biphenyl ( countable and uncountable, plural biphenyls ) ( organic chemistry, uncountable) A colourless solid hydrocarbon, C 12 H 10, consisting of two benzene rings … siemens fmea softwareWebbiphenyl: [ bi-fen´il ] diphenyl . polybrominated biphenyl (PBB) any of various brominated derivatives of biphenyl; uses and toxic hazards are similar to those of polychlorinated … siemens flange mounted motor catalogueWebJan 17, 2024 · PCBs in Building Materials. Information for school administrators, building owners and managers. Information for contractors. Test methods for PCBs in buildings. … siemens force bore sizeWebDefinition. PCBs are chemicals formed by attaching one or more chlorine atoms (at the Xs in Figure 1 below) to a pair of connected benzene rings. Figure 1: Polychlorinated … siemens first surge protector fs140WebNov 30, 2024 · Table of Aroclors. This page contains a list of common Aroclors. The numbering standard for the different Aroclors is as follows: The first two digits usually refer to the number of carbon atoms in the phenyl rings (for Polychlorinated Biphenyls this is 12). The second two numbers indicate the percentage of chlorine by mass in the mixture. siemens food warmerWebdiphenyl: [ bi-fen´il ] diphenyl . 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 ... siemens flothermWebPolychlorinated biphenyls (PCBs) are highly carcinogenic chemical compounds, formerly used in industrial and consumer products, whose production was banned in the United States by the Toxic Substances … the post time lounge longwood fl