​​​Manganese dioxide powder is a black - brown or black inorganic compound.Chemically, it has a relatively stable structure. It is insoluble in water and most organic solvents, which gives it unique chemical properties. One of its most important characteristics is its strong oxidizing ability. In many chemical reactions, it acts as an effective oxidant. For example, in the laboratory, it is often used to facilitate the decomposition of hydrogen peroxide (2H2O =MnO2= 2H2O + O2↑), where it accelerates the release of oxygen.

Manganese dioxide powder has a wide range of applications. In the battery industry, it is a key component of dry - cell batteries such as alkaline batteries and zinc - carbon batteries. In these batteries, it functions as a cathode material, participating in the electro chemical reaction to generate electricity. In the field of catalysis, it is used as a catalyst or a catalyst support to speed up various chemical reactions. Moreover,it is also appliedin the glass - making and ceramics industries to adjust the color and certain physical - chemical properties of products.