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Radiolysis characterization of cetostearyl alcohol by gas chromatography-mass spectrometry.
Journal article

Radiolysis characterization of cetostearyl alcohol by gas chromatography-mass spectrometry.

  • Hong L Institute of Pharmaceutical Science, Swiss Federal Institute of Technology (ETH), Winterthurerstr. 190, CH-8057, Zurich, Switzerland.
  • Altorfer H
  • 2003-03-20
Published in:
  • Journal of pharmaceutical and biomedical analysis. - 2003
Fatty Alcohols
Gas Chromatography-Mass Spectrometry
Pulse Radiolysis
English Methods for sample preparation, assay test and impurity test were established. Degrees of cetostearyl alcohol (CSA) radiolyses in pure state, ointment base and in chloramphenicol eye ointment (CAPEO) were determined at doses of 25 and 50 kGy. Radiolyses of CSA occur in all cases. The degrees are directly proportional to the irradiation dose in each case. Forty-two impurities and radiolysis products were identified using gas chromatography-mass spectrometry. The radiolysis products were assigned to be n-alkane, n-aldehyde and 2-methyl-1-alcohol. Accordingly, the degradation pathways of cetosteary alcohol were elucidated. Radiolysis behaviors of CSA in pure state, eye ointment base and CAPEO were studied by assay and impurity analyses. The influence of eye ointment matrixes is modest and chloramphenicol molecule exhibits slight scavenger function for cetostearyl. Both qualitative and quantitative data confirm that the radiolysis products of CSA do not cause safety concerns for human use.
Language
  • English
Open access status
closed
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Persistent URL
https://sonar.ch/global/documents/47088
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