Polybrominated Dibenzo-p-Dioxins and Dibenzofurans - Environmental Health Criteria 205
Polybrominated dibenzo-p-dioxins (PBDDs) and polybrominated dibenzofurans (PBDFs) are almost planar tricyclic aromatic compounds. Theoretically, 75 PBDDs and 135 PBDFs are possible. In addition, a large number of mixed halogenated congeners 1550 brominatedlchlorinated dibenzo-p-dioxins (PXDDs) and 3050 brominatedlchlorinated dibenzofurans (PXDFs) are theoretically possible. Because of the complexity of the analytical procedures and paucity of analytical reference standards, it has been possible to characterize and determine only a small number of these compounds. The most toxic congeners are those substituted at positions 2, 3, 7, and 8. There are 7 2,3,7,8-substituted PBDDs and 10 2,3,7,8-substituted PBDFs, as well as 337 possible 2,3,7,8-substituted PXDDs and 647 possible 2,3,7,8-substituted PXDFs.
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1998
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Subjects: | CHEMICALS, BENZODIAZEPINES, TOXIC SUBSTANCES, |
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oai:wedocs.unep.org:20.500.11822-295322021-05-28T08:18:04Z Polybrominated Dibenzo-p-Dioxins and Dibenzofurans - Environmental Health Criteria 205 United Nations Environment Programme World Health Organization International Labour Organisation Inter-Organization Programme for the Sound Management of Chemicals (IOMC) Economy Division CHEMICALS BENZODIAZEPINES TOXIC SUBSTANCES Polybrominated dibenzo-p-dioxins (PBDDs) and polybrominated dibenzofurans (PBDFs) are almost planar tricyclic aromatic compounds. Theoretically, 75 PBDDs and 135 PBDFs are possible. In addition, a large number of mixed halogenated congeners 1550 brominatedlchlorinated dibenzo-p-dioxins (PXDDs) and 3050 brominatedlchlorinated dibenzofurans (PXDFs) are theoretically possible. Because of the complexity of the analytical procedures and paucity of analytical reference standards, it has been possible to characterize and determine only a small number of these compounds. The most toxic congeners are those substituted at positions 2, 3, 7, and 8. There are 7 2,3,7,8-substituted PBDDs and 10 2,3,7,8-substituted PBDFs, as well as 337 possible 2,3,7,8-substituted PXDDs and 647 possible 2,3,7,8-substituted PXDFs. 2019-08-20T20:34:43Z 2019-08-20T20:34:43Z 1998 Reports and Books 92 4 157205 1 https://wedocs.unep.org/20.500.11822/29532 English Public Text application/pdf Global |
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CHEMICALS BENZODIAZEPINES TOXIC SUBSTANCES CHEMICALS BENZODIAZEPINES TOXIC SUBSTANCES United Nations Environment Programme World Health Organization International Labour Organisation Inter-Organization Programme for the Sound Management of Chemicals (IOMC) Polybrominated Dibenzo-p-Dioxins and Dibenzofurans - Environmental Health Criteria 205 |
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Polybrominated dibenzo-p-dioxins (PBDDs) and polybrominated dibenzofurans (PBDFs) are almost planar tricyclic aromatic compounds.
Theoretically, 75 PBDDs and 135 PBDFs are possible. In addition, a large number of mixed halogenated congeners 1550 brominatedlchlorinated dibenzo-p-dioxins (PXDDs) and 3050 brominatedlchlorinated dibenzofurans (PXDFs) are theoretically
possible. Because of the complexity of the analytical procedures and paucity of analytical reference standards, it has been possible to characterize and determine only a small number of these compounds. The most toxic congeners are those substituted at positions 2, 3, 7, and 8. There are 7 2,3,7,8-substituted PBDDs and 10 2,3,7,8-substituted PBDFs, as well as 337 possible 2,3,7,8-substituted PXDDs and 647 possible 2,3,7,8-substituted PXDFs. |
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Economy Division |
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Economy Division United Nations Environment Programme World Health Organization International Labour Organisation Inter-Organization Programme for the Sound Management of Chemicals (IOMC) |
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Reports and Books |
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CHEMICALS BENZODIAZEPINES TOXIC SUBSTANCES |
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United Nations Environment Programme World Health Organization International Labour Organisation Inter-Organization Programme for the Sound Management of Chemicals (IOMC) |
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United Nations Environment Programme |
title |
Polybrominated Dibenzo-p-Dioxins and Dibenzofurans - Environmental Health Criteria 205 |
title_short |
Polybrominated Dibenzo-p-Dioxins and Dibenzofurans - Environmental Health Criteria 205 |
title_full |
Polybrominated Dibenzo-p-Dioxins and Dibenzofurans - Environmental Health Criteria 205 |
title_fullStr |
Polybrominated Dibenzo-p-Dioxins and Dibenzofurans - Environmental Health Criteria 205 |
title_full_unstemmed |
Polybrominated Dibenzo-p-Dioxins and Dibenzofurans - Environmental Health Criteria 205 |
title_sort |
polybrominated dibenzo-p-dioxins and dibenzofurans - environmental health criteria 205 |
publishDate |
1998 |
url |
https://wedocs.unep.org/20.500.11822/29532 |
work_keys_str_mv |
AT unitednationsenvironmentprogramme polybrominateddibenzopdioxinsanddibenzofuransenvironmentalhealthcriteria205 AT worldhealthorganization polybrominateddibenzopdioxinsanddibenzofuransenvironmentalhealthcriteria205 AT internationallabourorganisation polybrominateddibenzopdioxinsanddibenzofuransenvironmentalhealthcriteria205 AT interorganizationprogrammeforthesoundmanagementofchemicalsiomc polybrominateddibenzopdioxinsanddibenzofuransenvironmentalhealthcriteria205 |
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