Dioxin / Furan Specific Isomers & Toxic Equivalent Factors

Specific Isomer	Compound Name	WHO EPA TEF (2005)	ITE TEF
Dioxin:
1 2378	TCDD Tetrachlorodibenzo-p-dioxin	1.00	1.00
2 12378	PeCDD Pentachlorodibenzo-p-dioxin	1.00	0.50
3 123678	HxCDD Hexachlorodibenzo-p-dioxin	0.10	0.10
4 123478	HxCDD Hexachlorodibenzo-p-dioxin	0.10	0.10
5 123789	HxCDD Hexachlorodibenzo-p-dioxin	0.10	0.10
6 1234678	HpCDD Heptachlorodibenzo-p-dioxin	0.01	0.01
7 12346789	OCDD Octachlorodibenzo-p-dioxin	.0003	0.001
Furan:
8 2378	TCDF Tetrachlorodibenzofuran	0.10	0.10
9 12378	PeCDF Pentachlorodibenzofuran	0.03	0.05
10 23478	PeCDF Pentachlorodibenzofuran	0.3	0.50
11 123678	HxCDF Hexachlorodibenzofuran	.10	0.10
12 123789	HxCDF Hexachlorodibenzofuran	.10	0.10
13 123478	HxCDF Hexachlorodibenzofuran	.10	0.10
14 234678	HxCDF Hexachlorodibenzofuran	.10	0.10
15 1234678	HpCDF Heptachlorodibenzofuran	.01	0.01
16 1234789	HpCDF Heptachlorodibenzofuran	.01	0.01
17 12346789	OCDF Octachlorodibenzofuran	.0003	0.001

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