FERROUS FUMARATE
Skin Conditioner
Moderate
CAS Number: 141-01-5
About FERROUS FUMARATE
An iron compound primarily used in supplements — uncommon in cosmetics. Provides skin conditioning but isn't well-studied for topical use.
Detailed Analysis
Ferrous fumarate (C₄H₂FeO₄, CAS 141-01-5) is an iron(II) salt of fumaric acid, widely used as an oral iron supplement for anaemia treatment. In cosmetics, it's listed for skin conditioning and appears in products ranging from hair care to makeup. The CIR has reviewed it, and EWG lists it with moderate concern. While oral iron supplementation supports skin health (collagen production, wound healing), topical iron compounds carry potential oxidative stress concerns. Iron can catalyse free radical formation (Fenton reaction), which is counterproductive in skincare.
What It Does
Skin Benefits
- ✓ Skin conditioning agent
- ✓ Iron supports collagen synthesis and wound healing when absorbed
Known Concerns
- ⚠ Iron can catalyse free radical formation via Fenton chemistry when applied topically
- ⚠ Limited safety data specific to topical cosmetic use
- ⚠ May stain skin or fabrics
- ⚠ Primarily a pharmaceutical/nutritional ingredient, not a traditional cosmetic ingredient
Safety Score
Moderate
Based on EU regulatory data, published safety research, and ingredient function analysis.
References
EU CosIng Database
European Commission cosmetic ingredient registry
PubChem
National Library of Medicine compound data
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Download LuxSenseThis information is for educational purposes only and does not constitute medical advice. Always consult a healthcare professional for skin concerns or allergies.