Morphinan is a chemical compound that is commonly used in the pharmaceutical industry as a painkiller, cough suppressant, and anesthetic. However, during the synthesis of morphinan, impurities can be formed which can have harmful effects on human health. These impurities can cause various side effects such as nausea, vomiting, dizziness, and even death in severe cases. Therefore, it is important to monitor and control the levels of morphinan impurities in pharmaceutical products to ensure their safety and efficacy.