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Chromium (III) oxide

CAS 1308-38-9
28

Safety score · 0–100

Caution

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

About

A trivalent chromium compound used as a pigment with skin sensitisation potential, restricted in EU cosmetics to below 0.1%.

Chromium (III) oxide (Cr2O3) is a trivalent chromium compound widely used as a green pigment in cosmetic formulations. Under EU Cosmetics Regulation Annex III, chromium (III) compounds are restricted to below 0.1% as a constituent of substances or mixtures. While Cr(III) is far less toxic than Cr(VI), it can cause sensitisation (H317) and presents concerns for individuals with chromium allergy.

Known concerns

  • Restricted in EU cosmetics (Annex III, <0.1%)
  • Skin sensitiser (H317)
  • Chromium allergy concern
  • Respiratory sensitiser (H334)
  • Potential carcinogenic concern at elevated oxidation states

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.