Polychlorinated biphenyls pcbs are a group of 209 synthetic organic compounds with 110 chlorine atoms attached to biphenyl. Monochlorobiphenyls dichlorobiphenyls trichlorobiphenyls. Aroclor 1260 aroclor 1262 aroclor 1268 total pcb output is organized and summed by aroclor pattern. This light yellow viscous liquid is a particularly highly chlorinated pcb mixture which, by definition, contains 54% chlorine by weight. Aroclor 1268 is a highly chlorinated pcb mixture that was released into the aquatic environment near brunswick, ga br, as a result of decades of local industrial activity. A polychlorinated biphenyl pcb is an organic chlorine compound with the formula c 12 h 10. This extensive contamination has led to us epa superfund designation in estuarine areas in and around purvis creek, ga. Pcb formulation of poland, sovol technical pcb formula tion of russia, and. This document is written for region 4 project managers, onscene coordinators, and technical staff and provides a recommended approach for the evaluation and characterization of polychlorinated biphenyls pcbs in groundwater, soil, and sediment in order to support defensible and protective remedy. Farmed salmon exhibit very similar congener patterns that overlap the pca and aroclor composition of their food, while wild salmon separate into two distinct groups, with chinook and coastal. Environmental health perspectives differential effects of two lots of aroclor 1254. Structure, properties, spectra, suppliers and links for.
Distribution and sources of pcbs aroclor 1268 in the. Ecological and regulatory implications of pcb aroclor 1268. Two other sampling events showed nondetect result for aroclor 1260 at tl1is well location mw359b. Aroclor 1242 high level pcb1242h organic standards.
Aroclor synonyms, aroclor pronunciation, aroclor translation, english dictionary definition of aroclor. Pcb congener composition in a sediment sample collected on the west 4c2 and east sb23 side of hunters point shipyard south basin, and the pcb composition in a. Towards a global historical emission inventory for. Identification and quantitation of pcb aroclor mixtures in. Congenerspecific and aroclor pcb analysis on the ht8pcb. Dale published november 2007 to be presented a1 wm 2008 phoenix wm symposia, inc. Information provided on aroclor 1242 53469219 is for reference only and is subject to change. Pcb congener composition of aroclors a detailed analyses of the pcb congener distributions present in aroclors 1016, 1242, 1248, 1254, and 1260. Relatively rare pcb accounted for approximately 10% of worldwide production of pcbs generally used as a plastisizer in caulking and roofing compounds was not previously known to be present in any quantity at ames research center. Aroclor 1221 is a commercial mixture of pcbs with an average chlorine content of 21%. Methods of analysis of pcbs in sediments, water, and biota. Since the congener composition of aroclor 1268 differs substantially from that of the predominant pcb mixture aroclor 1254 used to derive the csfs, the validity of applying existing csfs to aroclor 1268 is questionable. Composition of pcb aroclor mixtures % chlorine by homologue substitution number 0 10 20 30 40 50 60 ue 1221 1242 1248 1254.
Program and regulatory information about this substance, including links to epa applicationssystems, statuesregulations, or other sources that track or regulate this substance. Aroclor definition of aroclor by the free dictionary. Northeast waste management officials association newmoa. Aroclors 1221, 1232, 1242, 1254, 1260, and 1268 were the commercial pcb products that. Comparison of the compositions of aroclor 1242 and aroclor 1016. Chemical characterization of polychlorinated biphenyls, dibenzop. Aroclor 1268 standard persistence and degradability may cause longterm adverse effects in the environment. We also examined the composition of an aroclor 1268 preparation to evaluate its toxic potential. Behavioral dysfunctions, including deficits in visual recognition and shortterm memory, also have been observed in infants of human mothers who consumed fish contaminated with pcb mixtures of unknown composition fein et al. Identification of the substancemixture and of the companyundertaking 1. Aroclor 1242 had approximately 150 ppb of chlorinated dibenfurans, of which 43% was the toxic 2,3,7,9tetrachloro isomer.
Typical pcb aroclor composition by congener class percentage of the total chlorine in the aroclor contained in this congener congener homologue class level of chlorination aroclor 1016 1242 1248 1254 1260. Distribution and characterization of polychlorinated biphenyl. The use of aroclor 1268 at a former chloralkali plant in coastal georgia united states has resulted in. The use of decachlorobiphenyl pcb 209 as an internal standard will result in negative bias if aroclor 1268 is present in environmental samples aroclor 1268 contains 4. Aroclor 1242 produced no ill effects on basis of mortality, growth, pathology, organ enlargement, liver function, or hematological changes. Supelco aroclor standard mix 1, aroclor standard 200 ugml dichloromethane 1x1ml, aroclor standard 200 ugml hexane 1x1ml. Als environmental does not sell chemicals, but offers analytical lab testing to determine the presence of various elements and chemical compounds. Development of an oral cancer slope factor for aroclor 1268. Indication of any immediate medical attention and special treatment needed. Aroclor 1268 standard safety data sheet according to regulation e c no.
Pcb composition in a mixture of aroclors 12541260 and only aroclor. Production, importexport, use, and disposal chemical company produced aroclors 1221, 1232, 1242, 1248, 1254, 1260, 1262, and 1268. For more information about the substance, you may click one of the links below to take you to the relevant section. Comparison of composition of aroclor mixtures tested. Aroclor 1260 one detection of aroclor 1260 occmted in past sampling events. Indicates high toxicity in the given toxicological category. On the chemistry side, there are 209 different pcb molecules called congeners, and each of the aroclors is a. With the exception of aroclors 1221 and 1268, aroclors do not crystallize upon. Polychlorinated biphenyls were once widely deployed as dielectric and coolant fluids in electrical apparatus, carbonless copy paper and in heat transfer fluids because of their longevity, pcbs are still widely in use, even though their manufacture has declined drastically since the 1960s. The complete polychlorinated biphenyl compositions of two american products, aroclor 1242 and its more modern replacement, aroclor 1016, have been determined by gasliquid chromatography glc on twelve liquid phases of differing selectivities. Also, the lighter aroclors were clear and the heavier ones had a darker quality to them. The hazard fields include special hazard alerts air and water reactions, fire hazards, health hazards, a reactivity profile, and details about reactive groups assignments and potentially incompatible absorbents. Aroclor 1254 is one of several commercial pcb mixtures that were marketed between the 1930s and 70s.
Indicates no available weightoftheevidence summary assessment. Aroclor 1254 produced no harmful effects regarding growth or mortality, but did produce enlarged livers with microscopic evidence of hepatic cellular injury. It is composed of mono to heptachlorinated homologs. In the absence of information on the chemical composition of aroclor 1268, we assumed that other aroclors was a.
Results can be rechecked through manual editing of results through view reports. Human limited evidence imemdt iarc monographs on the evaluation of carcinogenic risk of chemicals to man. Aroclor 1221 had the viscosity of a light machine oil. There is no warranty of accuracy or completeness of any information contained herein. For additional information on toxicity from scientific journals or registration documents, see the additional resources for toxicity section of the chemical detail page 1. Differences between the pcb aroclors oreilly, talbot. Hepatocellular carcinoma was the most frequently found lesion in animals sacrificed at the end of the experiment, observed in 2, 3, and 61% of the animals in the control, clophen a30 and clophen. Congenerbased aroclor quantification and speciation. Epa region 4 technical services section issue paper for. We have therefore undertaken the task of developing cancer potency estimates specifically for aroclor 1268. Pcb data set 1 is provided in the supplementary material on this books website. Rpc1016 product name aroclor 1016 pcb 1016 index number 602039004 ec number 2156481 cas number 12674112 1. Comparison of the compositions of aroclor 1242 and aroclor.
This handbook provides information on conducting environmental forensic investigations. Handbook of environmental data on organic chemicals. Aroclor 1268 was pretty much a solid at room temperature. Separate analyte names, cas numbers, or element abbreviations with a hard return enter key, or paste list directly into the box. Congenerspecific compositions of example marketed aroclors. The information in cameo chemicals comes from a variety of data sources. Pcb1268 polychlorinated biphenyl mixture with 68% chlorine. Unfortunately, the method has procedural recommendations that might be counterproductive. World health organization, internation agency for research on cancer,lyon, france single copies can be ordered from who publications centre. Aroclor 1248 is a commercial mixture of pcbs with an average chlorine content of 48%. Dale walker agilent gcms applications engineer lets take a closer look at what.