Prilocaine is a local anesthetic used to numb specific areas during medical procedures. However, it is important to ensure that the Prilocaine used is pure and free from impurities. Impurities in Prilocaine can affect the safety and efficacy of the drug, leading to adverse effects such as allergic reactions, skin irritation, and other complications. Therefore, it is crucial to monitor and control the impurities present in Prilocaine to ensure its safety and effectiveness.