Cobalt(II) citrate hydrate is widely used in the animal feed industry as a dietary supplement to ensure proper cobalt levels, which are essential for the synthesis of vitamin B12 in ruminants. In the medical field, it serves as a source of cobalt in the formulation of certain medications and nutritional supplements, addressing cobalt deficiencies in humans. Additionally, it finds application in research laboratories as a reagent for studying cobalt's role in biological systems and its interactions with other compounds. In industrial settings, it is utilized in the production of catalysts and as a precursor in the synthesis of cobalt-based materials for various chemical processes.