Used as a calibration standard in analytical chemistry for the determination of cadmium in environmental, biological, and industrial samples. Commonly employed in atomic absorption spectroscopy (AAS) and inductively coupled plasma mass spectrometry (ICP-MS) to ensure accurate instrument response. Also utilized in electroplating processes to maintain consistent metal ion concentration in plating baths. Serves as a reference material in quality control and regulatory testing for monitoring heavy metal contamination in water, soil, and consumer products.