Used as a reference standard in pharmaceutical quality control to detect and quantify impurities during the manufacturing of imatinib mesylate, a drug primarily used in treating certain cancers like chronic myeloid leukemia (CML) and gastrointestinal stromal tumors (GIST). It helps ensure the purity, safety, and consistency of the final drug product by monitoring the presence of related substances that may form during synthesis or storage. Also utilized in analytical research and method development for HPLC and other chromatographic techniques.