2,3,7,8-Tetrachlorodibenzofuran, 13C-labeled
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This article is compiled based on the United States Pharmacopeia (USP) – 2025 Edition
Issued and maintained by the United States Pharmacopeial Convention (USP)
13C12H4Cl4O 317.84—Clear, colorless liquid.
Assay: Inject an appropriate volume into a gas chromatograph (see Chromatography〈621〉) equipped with an electron-capture detector, helium being used as the carrier gas. The following conditions have been found suitable: a 0.32-mm × 60-m capillary column coated with a 1-μm layer of phase G27; the injection port temperature is maintained at 300°; the detector temperature is maintained at 350°; and the column
temperature is maintained at 70° and programmed to rise 15° per minute to 275°. The area of the 13C12H4Cl4O peak is not less than 99.0% of
the total peak area.
[Note—A suitable grade is available from Cambridge Isotopes Laboratories (www.isotope.com).]
