Iron Dioxide

Iron Dioxide 1
AKA: Iron oxide (Fe2O4), Iron oxide (FeO2), 12411-15-3, Iron oxide (ACGIH)
Synthetic
Colorant
Mineral
Clean
Iron Dioxide is a cosmetic ingredient. Also known as Iron oxide (Fe2O4). Rated low hazard by EWG.
Formula
FeO2
Mol. Weight
87.84
CAS #
12411-15-3
Form
Powder
State
Dry Powder; Pellets or Large Crystals
Functions
Cosmetic Colorant
Gives the product its color. Purely aesthetic — makes the formula look good in the jar but does nothing for your skin.
Provides scent
Traditional Use
Iron oxides have been used as colorants and pigments since ancient times in cosmetics, paints, and dyes. Historically mined and used in traditional cultures for body art and cosmetic pigmentation.
EWG
1
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
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory0 listings
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR