Used primarily as a reference standard or impurity control in the pharmaceutical industry during the synthesis and quality testing of cabozantinib, a tyrosine kinase inhibitor used in cancer treatment. It helps ensure the purity, stability, and consistency of the active pharmaceutical ingredient by serving as a marker for degradation products or side reactions during manufacturing and storage. Its presence is monitored using analytical methods such as HPLC or LC-MS to maintain drug safety and efficacy.