Used in analytical chemistry for the determination of reducing agents through iodometric titrations. Commonly applied in the quantification of sulfites, thiosulfates, and ascorbic acid in food and pharmaceutical samples. Also employed in the standardization of sodium thiosulfate solutions. In environmental testing, it helps measure dissolved oxygen in water via the Winkler method. Its high purity and stability make it suitable for precise volumetric analysis in quality control laboratories. Additionally, it can be used to determine iodine content in iodized salt.