Colorant
ZIRCONIUM POWDER
Safety score · 0–100
Caution
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
Finely divided zirconium metal — pyrophoric and flagged for allergic skin reaction and respiratory irritation. Not a typical leave-on cosmetic ingredient.
Zirconium powder (CAS 7440-67-7, PubChem CID 23995) is elemental zirconium in divided form. GHS classifies it as a flammable/pyrophoric solid (H250, H251, H260, H228), respiratory irritant (H335), and potential skin sensitizer (H317). While certain zirconium complexes have historical antiperspirant use, the free metal powder is unsuitable for direct cosmetic application. The US FDA restricted zirconium-containing aerosol antiperspirants in 1977 due to lung-granuloma risk, and EU CosIng lists tight controls for zirconium salts. Formulators should only use approved, specific zirconium complexes, never elemental zirconium dust.
Function
Skin benefits
- Historical use in antiperspirant actives
- Metallic reflective pigment property
- Not biologically reactive when oxidized/stabilized
Known concerns
- Pyrophoric metal powder — catches fire in air
- Skin sensitizer (H317)
- Respiratory irritant (H335); lung granulomas in antiperspirant aerosol history
- Not appropriate as free metal in cosmetics
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related colorants
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.