Black iron oxide (Fe3O4) is a versatile pigment used in construction, ceramics, plastics, and magnetic materials. In concrete and coatings, it provides a deep, rich black color that resists fading. It is also a key component in magnetic tapes, toner inks, and polishing compounds. Black iron oxide’s stability and non-toxic nature make it suitable for food packaging, cosmetics, and pharmaceutical applications. Its ability to resist UV light, heat, and chemicals ensures long-lasting performance across diverse industries.