Used in electroplating processes to provide a protective cadmium coating on metals, improving corrosion resistance. Commonly employed in the preparation of cadmium-based pigments and in the manufacturing of certain types of batteries, especially older nickel-cadmium (Ni-Cd) rechargeable batteries. Serves as a source of cadmium ions in analytical chemistry for qualitative and quantitative analysis. Also utilized in some specialized applications in electrochemistry and as a stabilizer in certain types of plastics to improve heat and light stability. Due to the toxicity of cadmium, its use is restricted in many industries and applications.