WebJun 1, 1994 · Guidelines for Carcinogen Risk Assessment (U.S. EPA, 1986) Basis: A 1996 study found liver tumors in female rats exposed to Aroclors 1260, 1254, 1242, and 1016, and in male rats exposed to 1260. These mixtures contain overlapping groups of congeners that, together, span the range of congeners most often found in environmental mixtures. WebDioxins, furans, and dioxin-like polychlorinated biphenyls (PCBs) are the abbreviated names for a family of chemicals that have similar toxicity and shared chemical …

Chlorinated biphenyls Fisher Scientific

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 WebJan 31, 2012 · Polychlorinated biphenyls (PCBs) are mixtures of numerous homologous chlorinated compounds and positional isomers. The starting compound is biphenyl, to … honda suv with tow package

Polychlorinated biphenyl Definition & Meaning Dictionary.com

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 … WebIn many waterways around the United States, poly-chlorinated biphenyls (PCBs) have contaminated the sediments and wildlife. Given that most of the PCBs in the environment were released before 1980 and are still present in these ecosystems, which best describes this phenomenon? long persistence An infant can receive _________. 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 … honda suzuki can am of jackson