The chemical name for dioxin is: 2,3,7,8- tetrachlorodibenzo para dioxin (TCDD).
二恶英的化学名叫：2，3，7，8-四氯二苯并对二恶英（TCDD）。
Some 419 types of dioxin-related compounds have been identified but only about 30 of these are considered to have significant toxicity, with TCDD being the most toxic.
大约有419种类似二恶英的化合物被确定，但其中只有近30种被认为具有相当的毒性，以TCDD的毒性最大。
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