Used as a pigment in paints, coatings, and construction materials due to its red color and stability. Commonly found in rust-proof primers and anti-corrosion coatings. Employed in polishing agents for glass and metal surfaces. Utilized in the production of magnetic storage media and certain types of toners. Serves as a catalyst in industrial chemical reactions, such as the Haber process for ammonia synthesis. Added in concrete and cement to provide color and improve durability. Used in some medical applications as a component in drug delivery systems and diagnostic imaging. Also found in thermite mixtures for welding and metal cutting due to its exothermic reaction with aluminum.