Ci 77491

CI 77491 (iron oxide red) is an inert mineral pigment used in cosmetics and sunscreens at concentrations typically 1-25%. Clinical patch testing and decades of use data demonstrate exceptionally low irritation potential, as it is chemically stable, non-reactive, and does not penetrate skin. While hypersensitivity is theoretically possible in extremely rare cases, this ingredient has one of the best safety profiles in cosmetic formulation, suitable even for post-procedure and compromised skin barriers. Safety Notes: CI 77491 (red iron oxide) is used at trace levels (~0.0001–0.01%) in lightly tinted skincare, tone-up/anti-redness primers, and some lotions/SPF where it appears near the end of the INCI list. Mid-range use (~0.1–10%) is common across foundations, BB/CC creams, tinted sunscreens and concealers depending on shade depth. The upper end (up to ~35%) is observed in highly pigmented consumer-available color cosmetics such as cream/powder foundations, concealers, and stick products (including some “pure pigment”/camouflage-style makeup); rinse-off products rarely approach these levels because high pigment loads are generally unnecessary and less stable/sensorially acceptable.