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Toxic Equivalence (TEQ): TEQ is the product of the concentration of an individual DLC in an environmental mixture and its corresponding TCDD TEF for that compound.
2,3,7,8-Tetrachlorodibenzo-P-dioxin | C12H4Cl4O2 | CID 15625 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.
20 lut 2024 · TEQs are a weighted quantity measure based on the toxicity of each member of the dioxin and dioxin-like compounds category relative to the most toxic members of the category. EPA will use TEQs to account for how dioxin and dioxin-like compounds vary in toxicity.
For a single DLC, dioxin toxicity equivalence (TCDD TEQ) is the product of the concentration of the DLC in an environmental mixture and its corresponding TEF; total TEQ for the mixture is the sum of the individual TCDD TEQs across the DLCs.
The “Toxic Equivalent” (TEQ) scheme weighs the toxicity of the less toxic compounds as fractions of the toxicity of the most toxic TCDD. Each compound is attributed a specific “Toxic Equivalency Factor” (TEF) .
2,3,7,8-Tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD) is formed as an unintentional by-product of incomplete combustion. It may be released to the environment during the combustion of fossil fuels and wood, and during the incineration of municipal and industrial wastes. It causes chloracne in humans, a severe acne-like condition.
Based on data from the animal studies underlying the exposure guidance values, a serum lipid-adjusted dioxin toxicity equivalent (TEQ) concentration of approximately 15 ppt is consistent with the ATSDR minimal risk level (MRL) for dioxins.
