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

English: potassium permanganate,
Assamese: পটেছিয়াম পাৰমেংগানেট