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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Metabolism of tetrachlorophenols in the rat.

The three isomers of tetrachlorophenol were administrated intraperitoneally to rats and the urinary excretion products studied. Tetrachloro-p-hydroquinone was identified as a major metabolite of 2,3,5,6-tetrachlorophenol, constituting about 35% of the dose given. Trichloro-p-hydroquinone was identified as a minor metabolite of both 2,3,4,5- and 2,3,4,6-tetrachlorophenol. 2,3,5,6-tetrachlorophenol was eliminated within 24 h, 2,3,4,6-tetrachlorophenol within 48 h while only 60% of the given dose of 2,3,4,5-tetrachlorophenol could be recovered within 72 h. The acute toxicity of the tetrachlorophenols and tetrachloro-p-hydroquinone was studied in mice upon oral and intraperitoneal administration. 2,3,5,6-tetrachlorophenol (LD50p.o. 109 mg . kg-1) was the most toxic compound followed by 2,3,4,6- and 2,3.4,5-tetrachlorophenol (LD50p.o. 131 and 400 mg . kg-1, respectively). Tetrachloro-p-hydroquinone proved to have low oral toxicity (LD50p.o. 500 mg . kg-1) but was more toxic than the tetrachlorophenols when administered intraperitoneally. The oral LD50 for pentachlorophenol, under identical experimental conditions was found to be 74 mg . kg-1.[1]


  1. Metabolism of tetrachlorophenols in the rat. Ahlborg, U.G., Larsson, K. Arch. Toxicol. (1978) [Pubmed]
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