2,3,7,8-Tetrachlorodibenzodioxin
（重定向自Tetrachlorodibenzodioxin）
![](/Images/godic/202502/15/Dioxin-3D-vdW5717.png")
![Viktor Yushchenko with chloracne after his TCDD poisoning incident](/Images/godic/202502/15/Viktor_Yuschenko5717.jpg")
![Cloracné en la oreja y cuello de un trabajador por el uso de herbicidas.](/Images/godic/202502/15/Chloracne-in-herbicide-worker5717.png")
2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is a polychlorinated dibenzo-p-dioxin (sometimes shortened, though inaccurately, to simply "dioxin") with the chemical formula C
12H
4Cl
4O
2. TCDD is a colorless solid with no distinguishable odor at room temperature. It is usually formed as a side product in organic synthesis and burning of organic materials.