Abstract
The present study utilized the thermoanalytical techniques (TG, DTG, DTA and DSC) to evaluate the thermal behavior of tablets containing paracetamol and marketed as reference, generic and similar. The samples were also characterized by IR, X-ray diffraction and SEM. The TG/DTG curves presented similar behaviour indicanting a low influence of the excipients present in pharmaceutical formulations. The DTA and DSC curves showed an endothermic peak between about 165.0 and 195.0 oC characteristic of melting of paracetamol in all samples. The X-ray diffraction patterns showed similarities and characterized the compounds as crystallines. The micrographs indicated heterogeneity in particle size.
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