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Antimicrobial

COLLOIDAL SILVER

CAS 7440-22-4 Updated
22

Safety score · 0–100

Caution

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

About

Colloidal silver — silver nanoparticles marketed for antimicrobial effect. Not authorized as a preservative in EU cosmetics and carries argyria and bioaccumulation risks.

Skin benefits

  • Marketed antimicrobial action

Known concerns

  • Argyria (permanent skin discoloration) risk
  • Not permitted as cosmetic preservative in EU
  • Bioaccumulation concerns
  • Marketing exceeds evidence

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.