Red Iron Oxide (CI 77491)

Red Iron Oxide (CI 77491) 1
Red Iron Oxide (CI 77491) 2
Red Iron Oxide (CI 77491) 3
Red Iron Oxide (CI 77491) 4
AKA: Iron trioxide, Iron(3+) oxide, Anhydrous Ferric Oxide, Anhydrous Iron (III) Oxide
Synthetic
Colorant
Not Clean
Red Iron Oxide (CI 77491) is a cosmetic ingredient.
CAS #
1309-37-1, 1317-61-9, 1345-27-3, 52357-70-7, 1345-25-1
Form
Powder
State
Solid
Functions
Opacifying
Cosmetic Colorant
Gives the product its color. Purely aesthetic — makes the formula look good in the jar but does nothing for your skin.
EWG
4
CIR
Safe
Pregnancy
Yes
CIR Safety Findings
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Verified Jun 2026
Data: CosIng · EWG · CIR