Used primarily as a reference standard or impurity marker in the quality control of Imatinib, a pharmaceutical used in the treatment of certain cancers such as chronic myeloid leukemia (CML). It helps in the identification, quantification, and monitoring of impurities during the synthesis, degradation, or storage of Imatinib. This ensures drug purity, safety, and regulatory compliance in pharmaceutical manufacturing. Also utilized in analytical studies including HPLC and mass spectrometry for method development and validation.