Pyroxasulfone is an herbicide used in agriculture to control weeds. During the manufacturing process of pyroxasulfone, impurities may be formed. These impurities are undesired substances that can affect the quality and efficacy of pyroxasulfone. Therefore, it is necessary to identify and control these impurities to ensure the safety and effectiveness of the final product. Analytical methods are used to detect and quantify pyroxasulfone impurities to meet regulatory requirements.