murphyIron Dioxide
AKA: Iron oxide (Fe2O4), Iron oxide (FeO2), 12411-15-3, Iron oxide (ACGIH)
Synthetic
Colorant
Mineral
Clean
OriginIron oxide is produced through synthetic chemical processes rather than mined from natural mineral sources. It is synthesized by oxidation of iron salts or through controlled thermal decomposition of iron compounds.
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
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
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
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