Iron Dioxide
AKA “Iron oxide (Fe2O4), Iron oxide (FeO2), Iron oxide (ACGIH), RefChem:791356, EINECS 215-570-8”
Mineral
Ingredient Facts
Iron dioxide
AKA: Iron oxide (Fe2O4), Iron oxide (FeO2), Iron oxide (ACGIH), RefChem:791356, EINECS 215-570-8
Mineral · Colorant · EWG: 5
Synthetic
Colorant
Skin Conditioner
Mineral
Clean
A natural mineral that adds subtle warmth and dimension to color cosmetics while providing a clean, mineral-based alternative to synthetic colorants.
Formula
FeO2
Mol. Weight
87.84
CAS #
12411-15-3
Form
Powder
State
Dry Powder; Pellets or Large Crystals
See origin →
Functions
Colorant
Gives the product its color. Purely aesthetic — makes the formula look good in the jar but does nothing for your skin.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
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.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR