Displaying 1 results of Perphenazine Impurities Perphenazine Impurities are unwanted substances that may be present in perphenazine, a medication used to treat symptoms of schizophrenia and other psychotic disorders. These impurities can affect the quality and safety of the medication, and may also cause adverse effects in patients. It is therefore important for pharmaceutical companies to monitor and control the levels of perphenazine impurities during the manufacturing process. Analytical methods such as high-performance liquid chromatography (HPLC) and gas chromatography (GC) are commonly used to detect and quantify these impurities.