Toxic Equivalency Factors

Table 38 to Subpart G 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 [89 FR 43220, May 16, 2024]