Used in the textile industry for flame retardant treatments and as a stabilizer in the production of synthetic fibers. Commonly employed in analytical chemistry for the detection and determination of iron and other metal ions due to its ability to form colored complexes. Applied in the formulation of certain photographic chemicals and in the development of some types of photographic film. Utilized in the mining industry for the extraction of gold and silver through thiocyanate leaching processes. Also found in some laboratory reagents and as a component in cold wave solutions for permanent hair waving in cosmetics.