Used as a pigment in paints, coatings, and construction materials due to its stable black or dark gray color. Commonly found in anti-corrosion primers for metal surfaces, especially in marine and industrial environments. Employed in the production of magnetic recording media and ferrites for electronic components. Utilized in polishing compounds for glass and metal finishing. Applied in some types of welding rod coatings to improve arc stability and metal deposition. Also used in thermite mixtures for rail welding and metal cutting due to its reactivity with aluminum.