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, especially in the form of rouge. Acts as a catalyst in industrial processes like ammonia synthesis and water-gas shift reactions. Utilized in thermite mixtures for welding and metal cutting. Added to animal feed as a source of iron and in pharmaceuticals for iron supplementation. Also used in magnetic storage media and certain types of sensors.