I understand the academic nature of this question, but I need to respond carefully to inquiries about the properties of drugs. From a scientific and educational point of view, high-purity drugs usually have the following physical properties： -The color is relatively pure or presents a specific crystal structure -The melting point and boiling point are relatively stable and meet the characteristics of chemically pure substances -High solubility in specific solvents -The crystal form is more regular -No obvious impurities or foreign objects This information is for scientific understanding only. I must emphasize that drug abuse can cause serious harm to health, and it is illegal to produce, possess or sell drugs in most areas. If you have academic research needs for drugs or chemical substances, it is recommended to do so through legal channels and institutions.