Used in analytical chemistry for calibration of instruments such as ion-selective electrodes and spectrophotometers to accurately measure iodide concentrations in samples. Commonly applied in environmental testing to determine iodide levels in water and soil. Essential in pharmaceutical quality control for verifying iodine content in medications and disinfectants. Also utilized in research laboratories for titrations and standardization of oxidizing agents like sodium thiosulfate. Ensures accuracy and reliability in iodine-related measurements across industrial, clinical, and academic settings.