Used as a black pigment in ceramics, glass manufacturing, paints, and coatings due to its stable color at high temperatures and resistance to corrosion. Commonly employed in the production of ferrites for electronic components, especially in inductors and transformers, because of its magnetic properties. Also utilized in lithium-ion battery electrodes as a cobalt source, enhancing electrochemical performance. Serves as a catalyst in oxidation reactions, such as decomposition of toxic gases or pollution control, and in the synthesis of other cobalt-based materials.