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The chemical plant Chemko in Strážske (east Slovakia) was an important producer of polychlorinated biphenyls for the former communist bloc until 1984. Chemko contaminated a large part of east Slovakia, especially the sediments of the Laborec river and reservoir Zemplínska šírava .
Name CAS Number InChIKey Descriptors 0 C 12 H 10: Biphenyl 92-52-4 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 1 C 12 H 9 Cl: 2-Chlorobiphenyl 2051-60-7 LAXBNTIAOJWAOP-UHFFFAOYSA-N CP1 2 C 12 H 9 Cl: 3-Chlorobiphenyl 2051-61-8 NMWSKOLWZZWHPL-UHFFFAOYSA-N CP0 3 C 12 H 9 Cl: 4-Chlorobiphenyl 2051-62-9 FPWNLURCHDRMHC-UHFFFAOYSA-N CP0 4 C 12 H 8 Cl 2: 2,2 ...
A group of carcinogenic organic compounds, polychlorinated biphenyls (PCBs), is an example of a congener grouping. The number and locations of Cl groups can vary. In chemistry, congeners are chemical substances "related to each other by origin, structure, or function". [1]
The IPC preferred term for an assembled board is circuit card assembly (CCA), [19] and for an assembled backplane it is backplane assembly. "Card" is another widely used informal term for a "printed circuit assembly". For example, expansion card. A PCB may be printed with a legend identifying the components, test points, or identifying
Michigan Chemical Corporation (MCC) in St. Louis, Michigan, which was then owned by Velsicol Chemical Corporation, was a major producer of the FireMaster range of PBB-based flame retardants. FireMaster BP-6 (a yellow-brown powder) is a mixture of many different PBB congeners with 2,2',4,4',5,5'-hexabromobiphenyl and 2,2',3,4,4',5,5 ...
Biphenyl (also known as diphenyl, phenylbenzene, 1,1′-biphenyl, lemonene [4] or BP) is an organic compound that forms colorless crystals. Particularly in older literature, compounds containing the functional group consisting of biphenyl less one hydrogen (the site at which it is attached) may use the prefixes xenyl or diphenylyl.
General chemical structure of PCDFs, where 1 ≤ n+m ≤ 8 Structures of the ten 2,3,7,8-substituted PCDF congeners that are toxicologically of most relevance. Polychlorinated dibenzofurans (PCDFs) are a family of organic compounds with one or several of the hydrogens in the dibenzofuran structure replaced by chlorines.
The main purpose of chemical nomenclature is to disambiguate the spoken or written names of chemical compounds: each name should refer to one compound. Secondarily, each compound should have only one name, although in some cases some alternative names are accepted. Preferably, the name should also represent the structure or chemistry of a compound.