KMnO4, or potassium permanganate, is a chemical compound composed of potassium (K), manganese (Mn), and oxygen (O). It appears as dark purple or almost black crystals and is commonly used as an oxidizing agent in various chemical reactions, as well as in water treatment and disinfection processes. Additionally, it is utilized in organic chemistry for various synthesis reactions. Due to its strong oxidizing properties, it must be handled with care.