thermogravimetry–infrared spectroscopy (TG–FTIR) analyses were used to study the
antihypertensive drug atenolol. The TG–DSC curves provided information concerning the
thermal stability and decomposition profiles of the compound. From the TG–FTIR coupled
techniques, it was possible to identify ammonia and isopropylamine as possible volatile
compounds released during the thermal decomposition of the drug.