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2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is a polychlorinated dibenzo-p-dioxin (sometimes shortened, though inaccurately, to simply 'dioxin') [3] with the chemical formula C 12 H 4 Cl 4 O 2. Pure TCDD is a colorless solid with no distinguishable odor at room temperature.
2,3,7,8-Tetrachlorodibenzofuran (TCDF) is a polychlorinated dibenzofuran with a chemical formula of C 12 H 4 Cl 4 O. TCDF is part of the chlorinated benzofuran (CDF) family that contains between 1 and 8 chlorine atoms attached to the parent dibenzofuran ring system. The CDF family includes 135 compounds, of which only a few have been studied.
General chemical structure of PCDFs, where 1 ≤ n+m ≤ 8 Structures of the ten 2,3,7,8-substituted PCDF congeners that are toxicologically of most relevance Polychlorinated dibenzofurans ( PCDFs ) are a family of organic compounds with one or several of the hydrogens in the dibenzofuran structure replaced by chlorines.
The 2,4,5-T used was contaminated with 2,3,7,8-tetrachlorodibenzodioxin (TCDD), an extremely toxic dioxin compound. During the Vietnam war, between 1962 and 1971, the United States military sprayed 20,000,000 U.S. gallons (76,000,000 L) of chemical herbicides and defoliants in Vietnam, eastern Laos and parts of Cambodia, as part of Operation ...
There are 75 PCDD congeners, differing in the number and location of chlorine atoms, and 7 of them are specifically toxic, the most toxic being 2,3,7,8-tetrachlorodibenzodioxin (TCDD). Polychlorinated dibenzofurans (PCDFs), or furans. PCDFs are derivatives of dibenzofuran. There are 135 isomers; 10 have dioxin-like properties.
The following other wikis use this file: Usage on ar.wikipedia.org كلور; العامل البرتقالي; Usage on az.wikipedia.org Kanserogen
[2] 2,3,7,8-Tetrachlorodibenzodioxin (TCDD) is always a contaminant in this compound's production. Several accidents releasing many kilograms of TCDD have been reported. The reaction between 2,4,5-trichlorophenol and formaldehyde is exothermic. If the reaction occurs without adequate cooling, TCDD is produced in significant quantities as a ...
1,2,4,5-tetrachlorobenzene once was used as intermediates in the production of pesicides, [3] specifically trichlorophenols. This method has been discontinued because it also produced 2,3,7,8-tetrachlorodibenzo-p- dioxin .