Thiamethoxam is a systemic insecticide that is widely used in agriculture to control pests. However, the manufacturing process of thiamethoxam can result in the presence of impurities, which are unwanted and potentially harmful substances. Thiamethoxam impurities can include various chemical compounds such as isomers, byproducts, and degradation products. It is important to monitor and control these impurities to ensure the safety and effectiveness of thiamethoxam in agricultural applications.