Used as a pigment in paints, coatings, and construction materials due to its red color and stability. Commonly found in rust-proof primers because it helps prevent corrosion on steel surfaces. Employed in polishing agents for glass and metals, known as jeweler’s rouge. Acts as a catalyst in industrial processes like ammonia synthesis and water-gas shift reactions. Utilized in thermite mixtures for welding and cutting metals. Also found in some toners and magnetic storage media. In medicine, it serves as a component in drug delivery systems and as a contrast agent in certain diagnostic applications.