Any of several toxic or carcinogenic hydrocarbons that occur as impurities in herbicides

2,3,7,8-Tetrachlorodibenzo-p-dioxin is a polychlorinated dibenzo-p-dioxin with the chemical formula C12H4Cl4O2.

1,4-Dioxin is a heterocyclic, organic, non-aromatic compound with the chemical formula C4H4O2.

Dioxin may refer to: 1,2-Dioxin or 1,4-Dioxin, two unsaturated heterocyclic 6-membered rings in which two carbon atoms have been replaced by oxygen atoms, which gives the molecular formula C4H4O2 Dibenzo-1,4-dioxin, also known as dibenzodioxin or dibenzo-p-dioxin, in which two benzene rings are connected through two oxygen atoms.

Simple dioxins 1,2-dioxin and 1,4-dioxin