Thermodynamic properties of polymorphic forms of theophylline. Part I: DSC, TG, X-ray study

摘要

The physicochemical properties of theophylline hydrate and anhydrous polymorphic forms I and II were evaluated using crystallographic and calorimetric method. This study has been carried out with the following techniques: Differential scanning calorimetry (DSC), thermogravimetric analysis (TG) and X-ray diffractometry. The X-ray patterns on powder for investigated compounds are presented.