Used primarily as a reference standard in pharmaceutical quality control and analytical testing. It helps in the identification and quantification of impurities during the synthesis and formulation of pramipexole active pharmaceutical ingredient (API). Its application is critical in ensuring drug purity, safety, and consistency in batches produced for treating Parkinson’s disease and restless legs syndrome. Commonly employed in HPLC and LC-MS methods to validate assay performance and detect trace degradation products.