Chlorinated biphenyls
WebPolychlorinated Biphenyls (PCBs) is the common name for a family of chlorinated organic chemicals that contain many individual compounds with varying levels of toxicity. … Polychlorinated 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 Control Act in 1979 and internationally by the Stockholm Convention on Persistent Organic Pollutants in … See more Physical properties The compounds are pale-yellow viscous liquids. They are hydrophobic, with low water solubilities: 0.0027–0.42 ng/L for Aroclors brand, but they have high solubilities in most … See more The utility of PCBs is based largely on their chemical stability, including low flammability and high dielectric constant. In an electric arc, PCBs generate incombustible gases. See more Overview PCBs undergo xenobiotic biotransformation, a mechanism used to make lipophilic toxins more polar and more easily excreted from the body. The biotransformation is dependent on the number of chlorine … See more Commercial PCB mixtures were marketed under the following names: • Ascarel • Delor • Phenoclor • Pyralène (both used by Prodolec) See more One estimate (2006) suggested that 1 million tonnes of PCBs had been produced. 40% of this material was thought to remain in use. Another estimate put the total global … See more PCBs have entered the environment through both use and disposal. The environmental fate of PCBs is complex and global in scale. Water Because of their low vapour pressure, PCBs accumulate … See more The toxicity of PCBs varies considerably among congeners. The coplanar PCBs, known as nonortho PCBs because they are not substituted at the ring positions ortho to (next to) the other ring, (such as PCBs 77, 126 and 169), tend to have dioxin-like … See more
Chlorinated biphenyls
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WebPolychlorinated Biphenyls (PCBs) CAS Number: 1336-36-3 What are PCBs? Polychlorinated biphenyls (PCBs) were developed in the 1940's and were used … WebJan 1, 2024 · Polychlorinated biphenyls (PCBs) are a group of chlorinated aromatic compounds classified as one of the persistent organic pollutants (POPs), which is a class of hazardous pollutants with serious health effects on living organisms. PCBs are produced by catalytic chlorination of biphenyls yielding up to 209 products called congeners.
WebPolychlorinated biphenyls (PCBs) describe a group, of synthetic chlorinated organic compounds having the following structure: where each of the ten Z’s can represent either a hydrogen or a chlorine atom. There … WebPolychlorinated Biphenyls (PCBs) Polychlorinated Biphenyls (PCBs) CAS ID#: 1336-36-3, 11097-69-1 Affected Organ Systems: Immunological (Immune System), Neurological …
WebDioxins, furans, and dioxin-like polychlorinated biphenyls (PCBs) are the abbreviated names for a family of chemicals that have similar toxicity and shared chemical … 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 …
WebJan 31, 2012 · Polychlorinated biphenyls (PCBs) are mixtures of numerous homologous chlorinated compounds and positional isomers. The starting compound is biphenyl, to …
WebAug 30, 2024 · Polychlorinated biphenyls (PCBs) are chlorinated organic compounds in which the hydrogen atoms in biphenyls are replaced by one or more chlorine atoms. … gimp keeps crashingWebApr 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. gimp italiano per windows xpWebPolychlorinated Biphenyl. PCBs are a structurally related group of halogenated aromatic hydrocarbons that consist of 209 isomers and congeners with different numbers and … full body bean bag pillowWebpolychlorinated biphenyl or PCB, any of a group of organic compounds originally widely used in industrial processes but later found to be dangerous environmental pollutants. … full body bear pillowfull body beach bathing suit tulsi gabbardWebThe general chemical structure of chlorinated biphenyls is shown below. It can be seen from the structure that a large number of chlorinated compounds are possible. The 209 possible compounds are called congeners. PCBs can also be categorized by degree of … gimp keyboard codemapWebPCBs, especially the highly chlorinated congeners, tend to accumulate in lipid-rich tissues due to their lipophilic nature. Greater relative amounts of PCBs are usually found in. … gimp keyboard move selection