Alfentanil Impurities are chemical substances that may be present in Alfentanil, a potent opioid analgesic. These impurities can affect the quality, purity, and safety of the drug, potentially causing adverse reactions or reducing its effectiveness. The identification and control of these impurities are essential to ensure the quality and consistency of Alfentanil formulations for patient use. Various analytical techniques are used to detect and quantify these impurities in Alfentanil formulations.