Diflunisal is a nonsteroidal anti-inflammatory drug (NSAID) used to treat pain and inflammation. However, during the manufacturing process, impurities may be introduced into the final product. These impurities can have an impact on the efficacy and safety of the drug, and must be carefully monitored and controlled. Common diflunisal impurities include related substances, residual solvents, and heavy metals. Testing for these impurities is crucial to ensure the quality and purity
