- Table 10 to Subpart U of Part 63—Toxic Equivalency Factors
| Dioxin and Furan Congener | Toxic
equivalency factor | 1,2,3,7,8-pentachlorodibenzo-p-dioxin | 1 | 1,2,3,4,7,8-hexachlorodibenzo-p-dioxin | 0.1 | 1,2,3,7,8,9-hexachlorodibenzo-p-dioxin | 0.1 | 1,2,3,6,7,8-hexachlorodibenzo-p-dioxin | 0.1 | 1,2,3,4,6,7,8-heptachlorodibenzo-p-dioxin | 0.01 | octachlorodibenzo-p-dioxin | 0.0003 | 2,3,7,8-tetrachlorodibenzofuran | 0.1 | 2,3,4,7,8-pentachlorodibenzofuran | 0.3 | 1,2,3,7,8-pentachlorodibenzofuran | 0.03 | 1,2,3,4,7,8-hexachlorodibenzofuran | 0.1 | 1,2,3,6,7,8-hexachlorodibenzofuran | 0.1 | 1,2,3,7,8,9-hexachlorodibenzofuran | 0.1 | 2,3,4,6,7,8-hexachlorodibenzofuran | 0.1 | 1,2,3,4,6,7,8-heptachlorodibenzofuran | 0.01 | 1,2,3,4,7,8,9-heptachlorodibenzofuran | 0.01 | Octachlorodibenzofuran | 0.0003 |
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