Potassium permanganate is toxic. Potassium permanganate is toxic and corrosive. It can damage the respiratory tract if inhaled. When splashed in the eyes, it can irritate the conjunctiva and cause severe eye burns. The skin becomes brownish-black when irritated. High concentrations of potassium permanganate solutions or crystals are corrosive to the skin and irritating to tissues. Low concentrations of potassium permanganate can be antibacterial, hemostatic, and deodorizing. Potassium permanganate can be used for sterilization, can kill all kinds of bacteria, fungi, tuberculosis bacillus, in the clinic can be used for the treatment of acute dermatitis or acute eczema, clean up small ulcers, organic poisoning when washing the stomach, snake bites and so on. It can also be used to sterilize fruits and tableware. If you take potassium permanganate solution by mistake, gastrointestinal irritation will occur, and in serious cases, it will also lead to respiratory difficulties, if you take it by mistake, you can gargle with water, drink milk or egg white, and seek medical attention in a timely manner.