Table of Polychlorinated Biphenyl (PCB) Congeners | US EPA
2024年12月2日 · This contains a list of all PCB congeners, which is any single, unique well-defined chemical compound in the PCB category. The name of a congener specifies the total number of chlorine substituents and the position of each chlorine.
PCB congener list - Wikipedia
This is a complete list of polychlorinated biphenyl (PCB) congeners. Chemical structure of PCBs. The possible positions of chlorine atoms on the benzene rings are denoted by numbers assigned to the carbon atoms.
Learn about Polychlorinated Biphenyls | US EPA - U.S.
2024年10月17日 · The PCBs used in these products were chemical mixtures made up of a variety of individual chlorinated biphenyl components known as congeners. Most commercial PCB mixtures are known in the United States by their industrial trade names, the …
These 68 co-planar congeners include 20 with chlorine substitution at none (CP0, non-ortho) and 48 with chlorine substitution at only one (CP1, mono-ortho) of the 2, 2', 6, or 6' positions. These 169 congeners have a total of four or more chlorine substituents (regardless of position).
Polychlorinated biphenyl - Wikipedia
In terms of their structure and toxicity, PCBs fall into two distinct categories, referred to as coplanar or non- ortho -substituted arene substitution patterns and noncoplanar or ortho -substituted congeners. Structures of the twelve dioxin-like PCBs.
There are 209 distinct PCB compounds (known as congeners) with from 1 to 10 chlorine atoms on a biphenyl molecule. The number and placement of the chlorine atoms on the biphenyl molecule determines how the congener is named and dictates its environmental fate and toxicity.
Table of Polychlorinated Biphenyl (PCB) Congeners
2016年2月26日 · This contains a list of all PCB congeners, which is any single, unique well-defined chemical compound in the PCB category. The name of a congener specifies the total number of chlorine substituents and the position of each chlorine.
209 possible compounds are called congeners. PCBs can also be categorized by degree of chlorination. The term “homolog” is used to refer to all PCBs with the same number of chlorines (e.g., trichloro biphenyls). Homologs with different substitution patterns are referred to as isomers. For example, the dichlorophenyl homolog contains 12 ...
PCBs: Aroclors, Homologs and Congeners | O'Reilly, Talbot
2011年12月19日 · The USACE PCB congener method cites 22 congeners to be reported. The SW-846 8082 method cites 19 congeners to be reported. The WHO lists cites 12 congeners (those which the World Health Organization believes pose the greatest health concern – although this is disputed).
PCB Standards - AccuStandard
In 1993, AccuStandard was the first manufacturer to have synthesized all 209 PCB congeners. We offer a wide variety of reference standards for PCBs and related compounds to support the research and analysis of these environmental pollutants.