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CHRYSOCOLLA

CAS -
65

Safety score · 0–100

Fine

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

About

A hydrous copper silicate mineral with characteristic blue-green color, used as a natural colorant in cosmetic formulations.

Chrysocolla is an amorphous hydrous copper silicate (CuSiO3.nH2O) with a characteristic blue-green color. Copper compounds can cause skin sensitization in some individuals and may be skin irritants for sensitive skin. The EU Cosmetics Regulation restricts copper-based colorants depending on their specific form and solubility. Natural chrysocolla is not specifically listed in restriction annexes but copper itself falls under general metal restrictions. The hydrated nature of chrysocolla means lower bioavailability of copper compared to soluble copper salts. Used mainly in decorative and natural mineral cosmetics.

Skin benefits

  • Natural blue-green colorant
  • Used in natural and mineral cosmetics
  • Decorative aesthetic appeal

Known concerns

  • Copper content can cause skin sensitization
  • May be a skin irritant for sensitive individuals
  • Variable composition affects safety profile

References

EU

EU CosIng database

European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.

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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.