- Table 4 to Subpart DDDD of Part 60—Model Rule—Toxic Equivalency Factors

Dioxin/furan isomer Toxic
equivalency
factor
2,3,7,8-tetrachlorinated dibenzo-p-dioxin1 1,2,3,7,8-pentachlorinated dibenzo-p-dioxin0.5 1,2,3,4,7,8-hexachlorinated dibenzo-p-dioxin0.1 1,2,3,7,8,9-hexachlorinated dibenzo-p-dioxin0.1 1,2,3,6,7,8-hexachlorinated dibenzo-p-dioxin0.1 1,2,3,4,6,7,8-heptachlorinated dibenzo-p-dioxin0.01 octachlorinated dibenzo-p-dioxin0.001 2,3,7,8-tetrachlorinated dibenzofuran0.1 2,3,4,7,8-pentachlorinated dibenzofuran0.5 1,2,3,7,8-pentachlorinated dibenzofuran0.05 1,2,3,4,7,8-hexachlorinated dibenzofuran0.1 1,2,3,6,7,8-hexachlorinated dibenzofuran0.1 1,2,3,7,8,9-hexachlorinated dibenzofuran0.1 2,3,4,6,7,8-hexachlorinated dibenzofuran0.1 1,2,3,4,6,7,8-heptachlorinated dibenzofuran0.01 1,2,3,4,7,8,9-heptachlorinated dibenzofuran0.01 octachlorinated dibenzofuran0.001