Manganese Dioxide Powder is a black or dark brown crystals or amorphous powder. Manganese Dioxide Powder is insoluble in water and nitric acid, releases oxygen in hot concentrated sulfuric acid and produces manganese sulfate, releases chlorine in the hydrochloric acid, generates manganese chloride. With caustic alkali and oxidants permanganate eutectic formation is strong oxidizer. We are offering Manganese Dioxide Powder at very affordable rates.