Used as a pigment in coatings, plastics, and construction materials due to its stable black color. Commonly found in rust-proof paints and anti-corrosion primers. Also used in magnetic recording media and as a catalyst in industrial chemical reactions. Plays a role in the production of certain toners and inks. In some medical applications, it serves as a contrast agent in MRI when processed into nano-sized particles. Additionally, utilized in the steel industry for powder metallurgy and as a polishing agent for glass and metals.