Used in analytical chemistry for the determination of oxidizing agents such as hydrogen peroxide, ozone, and chlorine through iodometric titrations. The solution serves as a source of iodide ions, which are easily oxidized to iodine, enabling quantification of the oxidant by titration with sodium thiosulfate. Commonly applied in water quality testing, pharmaceutical analysis, and environmental monitoring to measure residual oxidants. Also utilized in calibration of instruments and validation of analytical methods requiring a reliable and consistent iodide source. Stable and reproducible performance makes it suitable for laboratory standards and quality control procedures.