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 validating the iodine content in medicinal products. Also utilized in research laboratories for titration procedures and development of iodide-sensing devices. Helps maintain accuracy and consistency in clinical diagnostics when measuring iodine in biological fluids.