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Degradation products of proguanil — 4-chloroaniline and related components with regard to genotoxicity

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Abstract

In the event of genotoxic impurities in drug products, knowledge of the origin and fate of these components is of particular importance. In the present study, commercially available proguanil tablets (Paludrine®) were investigated in respect of formation of the main degradation product, 4-chloroaniline (PCA), which is known to be genotoxic. The investigations made use of high performance liquid chromatography coupled with fluorescence detection (HPLC-FLD) and gas chromatography coupled with flame ionisation detection (GC-FID) systems. In addition, proposals for the structure of further proguanil degradation products were developed based on results obtained by mass spectroscopy (HPLC-MS). Database analysis using DEREK, MCASE, and Vitic was performed to obtain an initial toxicological evaluation of the proposed chemical structures. Finally, the absence of the newly established structures in stored proguanil tablets was verified.

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Authors and Affiliations

  1. Analytical Development, Bayer Healthcare Pharmaceuticals, Müllerstrasse 178, 13353, Berlin, Germany

    Katharina Schulz & Ulrich Oberdieck

  2. Department of Biopharmaceutics and Pharmaceutical Technology, University of Greifswald, Felix-Hausdorff-Strasse 3, 17487, Greifswald, Germany

    Katharina Schulz & Werner Weitschies

Authors
  1. Katharina Schulz
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  2. Ulrich Oberdieck
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  3. Werner Weitschies
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Correspondence to Katharina Schulz.

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Schulz, K., Oberdieck, U. & Weitschies, W. Degradation products of proguanil — 4-chloroaniline and related components with regard to genotoxicity. Chem. Pap. 67, 657–666 (2013). https://doi.org/10.2478/s11696-013-0333-9

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  • DOI: https://doi.org/10.2478/s11696-013-0333-9

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