Manganese dioxide is a black or brownish-black amorphous powder / orthorhombic crystal, odorless, stable at room temperature, with strong oxidizing properties, and it is the main component of pyrolusite in nature.

1. Battery industry: Cathode material for alkaline batteries and zinc-manganese dry batteries, serving as a core energy storage medium. 2. Catalyst: Used as a catalyst in organic synthesis, hydrogen peroxide decomposition and waste gas treatment. 3. Glass / Ceramics: Decolorizer and colorant, removing ferrous ion impurities. 4. Metallurgy: Oxidant for steel smelting to improve the purity of molten steel. 5. Others: Oxidant, rust remover, desiccant, and raw material for manganese salt preparation.