An important inorganic chemical compound with the formula Co(OH)₂, known as cobaltous hydroxide. It is a light gray powder, insoluble in water, slightly amphoteric, difficult to dissolve in strong alkali, but soluble in acids and ammonium salts.
Crude cobalt hydroxide is an essential industrial raw material, primarily used to produce cobalt sulfate, cobalt chloride, cobalt oxide, and other precursor materials for ternary cathodes. It is widely applied in lithium-ion battery cathodes, nickel-cadmium and nickel-metal batteries, catalysts, pigments, automotive components, and electronics. As technology advances and environmental protection demands increase, its application prospects will continue to expand.