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  • 1 Tanta University Faculty of Science Tanta Egypt Tanta Egypt
  • 2 National Organization for Drug Control and Research Giza Egypt Giza Egypt
  • 3 National Institute for Standards Radiation Dept. Giza Egypt Giza Egypt
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Timolol drug, has been investigated by using X-ray diffraction analysis, thermogravimetry (TG), differential thermal analysis (DTA), IR, HPLC and electronic absorption spectra (UV/Vis), before and after exposure to γ-radiation. The interaction ofγ-rays with timolol has been studied. Results obtained indicated high stability towardγ-absorbed dose over the range 5–50 kGy.