Appendix WHO-TEFs for human risk assessment based on the conclusions of the World Health Organisation (WHO) 0151 International Programme on Chemical Safety (IPCS) expert meeting which was held in Geneva in June 2005
United Kingdom
| Abbreviations used: ‘T’ = tetra; ‘Pe’ = penta; ‘Hx’ = hexa; ‘Hp’ = hepta; ‘O’ = octa; ‘CDD’ = chlorodibenzodioxin; ‘CDF’ = chlorodibenzofuran; ‘CB’ = chlorobiphenyl. | |||
| Congener | TEF value | Congener | TEF value |
|---|---|---|---|
| Dibenzo-p-dioxins (‘PCDDs’) | ‘Dioxin-like’ PCBs Non-ortho PCBs + Mono-ortho PCBs | ||
| 2,3,7,8-TCDD | 1 | ||
| 1,2,3,7,8-PeCDD | 1 | Non-ortho PCBs | |
| 1,2,3,4,7,8-HxCDD | 0,1 | PCB 77 | 0,0001 |
| 1,2,3,6,7,8-HxCDD | 0,1 | PCB 81 | 0,0003 |
| 1,2,3,7,8,9-HxCDD | 0,1 | PCB 126 | 0,1 |
| 1,2,3,4,6,7,8-HpCDD | 0,01 | PCB 169 | 0,03 |
| OCDD | 0,0003 | ||
| Dibenzofurans (‘PCDFs’) | Mono-ortho PCBs | ||
| 2,3,7,8-TCDF | 0,1 | PCB 105 | 0,00003 |
| 1,2,3,7,8-PeCDF | 0,03 | PCB 114 | 0,00003 |
| 2,3,4,7,8-PeCDF | 0,3 | PCB 118 | 0,00003 |
| 1,2,3,4,7,8-HxCDF | 0,1 | PCB 123 | 0,00003 |
| 1,2,3,6,7,8-HxCDF | 0,1 | PCB 156 | 0,00003 |
| 1,2,3,7,8,9-HxCDF | 0,1 | PCB 157 | 0,00003 |
| 2,3,4,6,7,8-HxCDF | 0,1 | PCB 167 | 0,00003 |
| 1,2,3,4,6,7,8-HpCDF | 0,01 | PCB 189 | 0,00003 |
| 1,2,3,4,7,8,9-HpCDF | 0,01 | ||
| OCDF | 0,0003 | ||
Annotations
Footnotes
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Martin van den Berg et al., The 2005 World Health Organisation Re-evaluation of Human and Mammalian Toxic Equivalency Factors for Dioxins and Dioxin-like Compounds. Toxicological Sciences 93(2), 223–241 (2006).