Used primarily as a reference standard in pharmaceutical quality control and analytical testing during the manufacturing of lenvatinib, this impurity helps ensure drug purity and consistency. It is essential in method development and validation of analytical techniques such as HPLC and LC-MS to detect and quantify impurities. Monitoring this impurity supports compliance with regulatory requirements by identifying potential degradation products or by-products in the final drug substance. Its presence is studied to assess the stability of lenvatinib formulations under various storage conditions.