Used as a catalyst in organic synthesis, particularly in oxidation reactions. Employed in the preparation of iron oxide pigments for paints, coatings, and ceramics due to its high iron content. Serves as a mordant in dyeing and printing textiles to improve color fastness. Utilized in analytical chemistry for detecting the presence of anions like thiocyanate, forming distinct color complexes. Also applied in the electronics industry for etching and surface treatment of metals. Its hygroscopic nature makes it useful in moisture-absorbing formulations.