Used as a catalyst in petroleum and chemical industries, especially in Fischer-Tropsch synthesis for converting syngas into liquid fuels. Serves as a precursor for cobalt oxide materials in battery electrodes, particularly in lithium-ion batteries. Employed in the production of pigments and driers for paints, inks, and coatings due to its ability to accelerate oxidation of drying oils. Applied in electroplating baths to deposit cobalt metal for wear and corrosion resistance. Utilized in ceramic glazes and glass coloring to produce blue to green shades. Also used in analytical chemistry as a reagent for detecting certain substances and in the preparation of other cobalt salts.