Black powder, soluble in acid, Insoluble in water and nitric acid, nonpoisonous Chemical Formula: MnO2 Molecular Weight ... cm3 Appearance: Black powder, soluble in acid, Insoluble in water and nitric acid, nonpoisonous Typical Analysis: ItemAlkaline Battery GradeZinc- ... industries of glass electronics, magnetic materials, dye, medicine, ceramic, water treatment, etc. Electrolytic Manganese Dioxide