Quinoxaline impurities are unwanted substances that can be present in quinoxaline-based drugs or products. These impurities can be formed during the manufacturing process or storage of the product. They can affect the quality, safety, and efficacy of the drug. Therefore, it is essential to identify, monitor, and control the levels of quinoxaline impurities to ensure the safety and effectiveness of the product. Analytical techniques such as high-performance liquid chromatography (HPLC) and gas chromatography (GC) are often used to detect quinoxaline impurities.