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{{encyclopedia|moderator=Henrik}}TEF (TCDD equivalency factor, toxic equivalency factor), a relative toxicity factor of a PCDD/F or PCB congener as related to TCDD. TEF values vary from 1 to 0.00001 or 0 (Table | [[category:Dioxin synopsis]] | ||
[[heande:Toxic equivalency factor|Toxic equivalency factor]] | |||
{{encyclopedia|moderator=Henrik}} | |||
'''TEF''' (TCDD equivalency factor, [[toxic equivalency factor]]), a relative toxicity factor of a [[PCDD/F]] or [[PCB]] congener as related to [[TCDD]]. TEF values vary from 1 to 0.00001 or 0 (Table; see also [[TEq]]). The latest re-evaluation of TEF values was that by WHO in 2006. TEF values from WHO 1998 of have been used here as WHO-TEF for PCDD/Fs and PCB-TEF for PCBs. TEq = ΣTEFi*Ci, where Ci is the amount (or concentration) of congener i. | |||
Table. Toxic equivalency factors for all [[PCDD/F]]s and [[PCB]]s that have a TEF>0. Other congeners are not supposed to have dioxin-like effects. IUPAC numbers for [[PCB]]s are given in parenthesis. | |||
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! Congener | ! Congener | ||
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==See also== | |||
* [[Toxic equivalency factor]] | |||
* [[:heande:Toxic equivalency factor|Toxic equivalency factor]] | |||
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TEF (TCDD equivalency factor, toxic equivalency factor), a relative toxicity factor of a PCDD/F or PCB congener as related to TCDD. TEF values vary from 1 to 0.00001 or 0 (Table; see also TEq). The latest re-evaluation of TEF values was that by WHO in 2006. TEF values from WHO 1998 of have been used here as WHO-TEF for PCDD/Fs and PCB-TEF for PCBs. TEq = ΣTEFi*Ci, where Ci is the amount (or concentration) of congener i.
Table. Toxic equivalency factors for all PCDD/Fs and PCBs that have a TEF>0. Other congeners are not supposed to have dioxin-like effects. IUPAC numbers for PCBs are given in parenthesis.
| Congener | WHO-TEF |
|---|---|
| PCDDs | |
| 2,3,7,8-TCDD | 1 |
| 1,2,3,7,8-PeCDD | 1 |
| 1,2,3,4,7,8-HxCDD | 0.1 |
| 1,2,3,6,7,8-HxCDD | 0.1 |
| 1,2,3,7,8,9-HxCDD | 0.1 |
| 1,2,3,4,6,7,8-HpCDD | 0.01 |
| OCDD | 0.0001 |
| PCDFs | |
| 2,3,7,8-TCDF | 0.1 |
| 1,2,3,7,8-PeCDF | 0.05 |
| 2,3,4,7,8-PeCDF | 0.5 |
| 1,2,3,4,7,8-HxCDF | 0.1 |
| 1,2,3,6,7,8-HxCDF | 0.1 |
| 1,2,3,7,8,9-HxCDF | 0.1 |
| 2,3,4,6,7,8-HxCDF | 0.1 |
| 1,2,3,4,6,7,8-HpCDF | 0.01 |
| 1,2,3,4,7,8,9-HpCDF | 0.01 |
| OCDF | 0.0001 |
| Non-ortho-PCBs | |
| 3,3’,4,4’-TCB (77) | 0.0001 |
| 3,4,4’,5-TCB (81) | 0.0001 |
| 3,3’,4,4’,5-PeCB (126) | 0.1 |
| 3,3’,4,4’,5,5’-HxCB (169) | 0.01 |
| Mono-ortho-PCBs | |
| 2,3,3’,4,4’-PeCB (105) | 0.0001 |
| 2,3,4,4’,5-PeCB (114) | 0.0005 |
| 2,3’,4,4’,5-PeCB (118) | 0.0001 |
| 2’,3,4,4’,5-PeCB (123) | 0.0001 |
| 2,3,3’,4,4’,5-HxCB (156) | 0.0005 |
| 2,3,3’,4,4’,5’-HxCB (157) | 0.0005 |
| 2,3’,4,4’,5,5’-HxCB (167) | 0.00001 |
| 2,3,3’,4,4’,5,5’-HpCB (189) | 0.0001 |