"Members of the same group" - Related chemicals that have the same chemical structure, but a different number and position of the substituent. The dioxin subgroups (from monochlorodibenzodioxins to octachlorodibenzodioxins), for example, can be distinguished by the number and position of their chlorine atoms.
A group of tricyclic chlororganic compounds (including polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) and polybromated dibenzo-p-dioxins (PBDD) that share similar chemical and biological properties.
Adverse effects on the developing fetus (after the first trimester of pregnancy).
International Toxic Equivalency Factors set by NATO/CCMS (North Atlantic Treaty Organisation/Committee on the Challenges of Modern Society)
International Toxic Equivalents set by NATO/CCMS (North Atlantic Treaty Organisation/Committee on the Challenges of Modern Society)
Affinity to interact with fat. Lipophilic substances, for example, accumulate in fatty tissue.
Abbreviation of polychlorinated dibenzo-p-dioxins and dibenzofurans.
Dibenzo-p-dioxin with 75 congeners and dibenzo-p-furans with 135 congeners
Persistence of a chemical in the environment. Persistent chemicals degrade only very slowly in the environment.
2,3,7,8-Tetrachloro-dibenzo-dioxin (2,3,7,8-TCDD); Still considered to be the most toxic substance ever synthesised. Does not occur naturally.
TDI (Tolerable Daily Intake)
The maximum amount of a contaminant that can be eaten every day over the whole lifetime without causing harm.
Toxic Equivalency Factor
Property of a chemical which causes abnormalities during the period of embryonic development (during the first trimester of pregnancy).
Toxic Equivalents are used to assess the risk posed by PCDD/F mixtures. Using TEQs, the toxicity of dibenzodioxins and furans containing four or more chlorine atoms are related - via certain factors - to the toxicity of 2,3,7,8-TCDD.
omnipresent, being present everywhere
Toxic Equivalents set by the World Health Organization WHO (1998)