Used as a catalyst in the petroleum and chemical industries to facilitate various chemical reactions, especially in the production of synthetic fuels. Serves as a precursor in the synthesis of other cobalt compounds used in industrial processes. Employed in the manufacture of pigments for ceramics, glass, and paints, providing a distinctive blue or green color. Utilized in the production of dry batteries and electroplating baths due to its electrochemical properties. Acts as a drying agent in paints, varnishes, and inks by accelerating the oxidation of drying oils. Also used in animal feed as a source of cobalt, an essential trace element for ruminant animals.