KMnO4, or potassium permanganate, is a chemical compound that appears as dark purple or black crystals. It is highly soluble in water, producing a deep purple solution. This compound is commonly used as an oxidizing agent in various chemical reactions and has applications in water treatment, where it helps eliminate impurities and bacteria. In addition to its industrial uses, KMnO4 is also utilized in medicine as a disinfectant and antiseptic for treating skin conditions. It can be found in some laboratory settings for titrations and as a reagent in organic chemistry.