Used primarily as a reference standard in pharmaceutical quality control and analytical testing, this compound helps in identifying and quantifying impurities during the manufacturing of etoricoxib, a nonsteroidal anti-inflammatory drug (NSAID). It ensures the purity, safety, and consistency of the final drug product by enabling accurate detection of by-products and degradation components in stability studies and process validation. Its presence is monitored using techniques like HPLC and mass spectrometry to comply with regulatory requirements.