Manganese(IV) oxide is the inorganic compound with the formula MnO2.This blackish or brown solid occurs naturally as the mineral pyrolusite, which is the main ore of manganese and a component of manganese nodules.
M 1485 (OTTO) Manganese dioxide Cas 1313-13-9 - used in manufacturing of manganese steel, for making amethyst glass, decolorizing glass, painting on porcelain, faience and majolica.