Manganese(II,III) Oxide is a highly insoluble thermally stable Manganese source, which the chemical compound with formula Mn3O4. As a transition metal oxide, Trimanganese tetraoxide Mn3O can be described as MnO.Mn2O3, which includes two oxidation stages of Mn2+ and Mn3+. It can be used for a variety of applications such as catalysis, electrochromic devices, and other energy storage applications. It is also suitable for glass, optic and ceramic applications.