Ad
related to: pcb toxicity chart
Search results
Results from the WOW.Com Content Network
Congener descriptors give a shorthand notation for geometry and substituent positions. The twelve congeners that display all four of the descriptors are referred to as being "dioxin-like", referring both to their toxicity and structural features which make them similar to 2,3,7,8-tetrachlorodibenzo-p-dioxin (2378-TCDD). [1]
Labelling transformers containing PCBs. 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 properties, and generally are among the most toxic congeners.
2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) is the reference chemical to which the toxicity of other dioxins and DLCs are compared. TCDD is the most toxic DLC known. Other dioxins and DLCs are assigned a scaling factor, or TEF, in comparison to TCDD. TCDD has a TEF of 1.0. Sometimes PCB 126 is also used as a reference chemical, with a TEF of 0.1.
High exposure to PCBs can also cause damage to the liver and the nervous system. [16] Aroclor 1260 in particular is found to cause metabolic disorders such as non-alcoholic fatty liver disorder, diabetes and obesity. [3] When interacting with other highly toxic chemicals, like PCDDs or PCDFs, toxic effects are generally more severe.
Dozens of Vermont school districts have sued chemical giant Monsanto over toxic contamination in educational buildings from now-banned industrial chemicals known as PCBs. Last year, Vermont became ...
The PCB oil leaked to rice bran oil consumed by thousands of people in Japan (Yusho disease 1968) and Taiwan (Yu-cheng disease 1979). The toxic effects have been attributed to dioxin-like PCBs and PCDFs. Their daily intake was up to 100,000 times higher than average intake presently. [1]
For premium support please call: 800-290-4726 more ways to reach us
Poe Hall is closed for the spring semester as the university conducts further testing for PCBs. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 ...
Ad
related to: pcb toxicity chart