Used as a precursor in the production of cobalt-based catalysts for hydrocarbon processing and Fischer-Tropsch synthesis. Commonly employed in electroplating and battery manufacturing, especially in lithium-ion and nickel-metal hydride batteries, due to cobalt’s electrochemical stability. Applied in the formulation of vitamin B12 supplements and as a nutrient in animal feed. Utilized in ceramics and glass to impart deep blue color and in drying agents for paints and inks. Also used in the synthesis of cobalt nanoparticles for advanced materials and medical imaging.