1. Potassium permanganate is an inorganic compound with the chemical formula KMnO4. It is a purplish-black crystalline salt, that dissolves in water as K+ and MnO−4, an intensely pink to purple solution.... from wikipedia.org

English: potassium permanganate,
Assamese: পটেছিয়াম পাৰমেংগানেট