Table 4: Equivalent toxicity factors according to the WHO 2005 for PCDD/F and PCB “dioxin-like” respectively.

PCDD/F	WHO-TEF (2005)	PCBdl	WHO-TEF (2005)
2,3,7,8-TCDD	1	3,3′,4,4′-TCB (77)	0.0001
1,2,3,7,8-PeCDD	1	3,4,4′,5-TCB (81)	0.0003
1,2,3,4,7,8-HxCDD	0.1	3,3′,4,4′,5-PeCB (126)	0.1
1,2,3,6,7,8-HxCDD	0.1	3,3′,4,4′,5,5′-HxCB (169)	0.03
1,2,3,7,8,9-HxCDD	0.1	2,3,3′,4,4′-PeCB (105)	0.00003
1,2,3,4,6,7,8-HpCDD	0.01	2,3,4,4′,5-PeCB (114)	0.00003
OCDD	0.0003	2,3,4,4′,5-PeCB (118)	0.00003
2,3,7,8-TCDF	0.1	2′,3,4,4′,5-PeCB (123)	0.00003
1,2,3,7,8-PeCDF	0.03	2,3,3′,4,4′,5-HxCB (156)	0.00003
2,3,4,7,8-PeCDF	0.3	2,3,3′,4,4′,5′-HxCB (157)	0.00003
1,2,3,4,7,8-HxCDF	0.1	2,3′,4,4′,5,5′-HxCB (167)	0.00003
1,2,3,6,7,8-HxCDF	0.1	2,3,3′,4,4′,5,5′-HpCB (189)	0.00003
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	0.0003
T= tetra; Pe=penta; Hx=hexa; Hp= hepta; O= octa.