Used as a stabilizer in certain types of photographic emulsions, helping to control the development process and improve image quality. Commonly employed in the textile industry for the production of synthetic fibers, particularly in the wet-spinning process of some acrylic fibers. Acts as a selective inhibitor in biochemical assays, interfering with thyroid peroxidase activity, which makes it useful in research related to thyroid function and hormone synthesis. Utilized in metal cleaning and plating processes due to its ability to dissolve and passivate certain metal oxides. Also serves as a reagent in analytical chemistry for the detection and determination of specific metal ions, such as iron, through colorimetric methods.