Used primarily in the production of cadmium-based batteries, especially nickel-cadmium (Ni-Cd) rechargeable batteries, where it serves as the negative electrode material. It also finds use in electroplating processes to provide corrosion resistance on metal surfaces. In some specialized applications, it acts as a precursor in the synthesis of other cadmium compounds used in pigments and stabilizers for plastics. Due to environmental and toxicity concerns, its use is limited and being phased out in many industries.