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Xenobiotica
the fate of foreign compounds in biological systems
Volume 22, 1992 - Issue 5
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Research Article

Structural determination of the carboxylic acid metabolites of polychlorotrifluoroethylene

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Pages 499-506 | Received 08 May 1991, Accepted 20 Dec 1991, Published online: 22 Sep 2008
 

Abstract

1. Polychlorotrifluoroethylene (PCTFE) is a perhalogenated hydrocarbon which consists mainly of C-6 and C-8 oligomers of chlorotrifluoroethylene (CTFE) end-capped with chlorine and referred to as trimer and tetramer, respectively. PCTFE is a hydraulic fluid considered for use in advanced weapon systems.

2. Inhalation studies have shown that PCTFE causes a dose-related hepatotoxicity in rats that is accompanied by proliferation of hepatic peroxisomes and increased liver weight.

3. Carboxylic acid metabolites of PCTFE have been isolated from rats exposed to PCTFE via inhalation. These metabolites, or their formation, may be involved in the toxicity of PCTFE.

4. Trimer carboxylic acids have been isolated from rat urine and identified, and tetramer carboxylic acids have been isolated from rat liver, and identified.

5. Our investigation of trimer and tetramer carboxylic acid metabolites of PCTFE has shown that the terminal carbon bearing two chlorine atoms is the exclusive site of oxidation. No evidence was found indicating oxidation of terminal carbon atoms having one chlorine.

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