Aqueous potassium permanganate solution has many medical uses and is also useful in everyday life. Potassium permanganate is a very common strong oxidizing agent, and is used as a bleaching agent for clothes and other stains in everyday life. In medicine, potassium permanganate is often used to disinfect and sterilize. In addition, in the emergency department, potassium permanganate is most commonly used in gastric lavage solution, for example, organophosphorus poisoning is often used with potassium permanganate for gastric lavage, as well as intractable chemical poisoning and severe food poisoning, can be treated with potassium permanganate with gastric lavage solution for gastric lavage. However, when used in gastric lavage solution, the solution of potassium permanganate must be prepared with clear water, or with flowing water, not boiling water or boiling water, otherwise the sterilization and pharmacodynamics of potassium permanganate will be significantly reduced.