Used as a pigment in paints, coatings, and construction materials such as concrete, tiles, and ceramics due to its stable black color and resistance to alkalis and heat, providing dark shading.

Employed in cosmetics like mascara and eyeliner as a safe, intense black colorant.

Utilized in toner formulations for photocopiers and laser printers.

Plays a key role in the production of certain steels, alloys, and magnetic materials, including ferrite magnets for magnetic disks and data storage media; also serves as a raw material in metal waste recycling.

Applied in medical formulations as a contrast agent in imaging (e.g., MRI) and in the synthesis of iron supplements for treating iron deficiency, with strict dosage control.

Additionally, used in environmental applications for removing pollutants from water through adsorption processes.