Used primarily as a reference standard in pharmaceutical quality control and analytical testing. It helps in identifying and quantifying impurities in amoxicillin formulations during manufacturing and stability studies. Plays a critical role in ensuring drug purity, safety, and consistency by enabling accurate detection of degradation products or synthesis by-products. Commonly employed in HPLC and LC-MS methods for method validation, calibration, and system suitability testing in antibiotic production labs.