Red Iron Oxide
CI 77491 (Red Iron Oxide) is a widely used inorganic pigment chemically identified as iron III oxide (Fe2O3). It is responsible for the characteristic "rust" red color in cosmetic formulations and also contributes pink tones in products such as foundations. It is registered under multiple CAS numbers including 1309-37-1 and 1317-61-9, and its official CosIng function is listed solely as a cosmetic colorant.
Red Iron Oxide functions primarily as a pigment to impart red and pink hues to cosmetic products. It is a stable, inorganic colorant with a long history of use across a wide range of makeup and skincare formulations.
Subject to cosmetic restriction IV/135 as noted in official CosIng information; users should ensure compliance with applicable regulatory limits for use in cosmetics.
