Asenapine is an atypical antipsychotic medication used to treat schizophrenia and bipolar disorder. As with any medication, there may be impurities present in the drug substance or drug product. These impurities can be potentially harmful and may affect the safety and efficacy of the medication. Therefore, it is important to monitor and control the levels of impurities in asenapine to ensure its quality and safety for patients. Impurities in asenapine can include degradation products, residual solvents, and other impurities introduced during the synthesis or manufacturing process. Regulatory agencies such as the FDA and EMA have set limits on the acceptable levels of impurities in asenapine, which manufacturers must comply with.