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Fluoresone (INN)

CAS 2924-67-6
45

Safety score · 0–100

Moderate

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

About

Fluoresone (INN) is a cosmetic ingredient used in product formulations. Its specific function may vary between products. Exercise caution due to limited available safety data.

Fluoresone (also known as 2-fluorenone or fluoren-2-one) is an aromatic ketone used as a hair dye intermediate. The EU CosIng database lists it with hair dye restrictions (Annex III). Fluorene derivatives are subject to biodegradation and environmental concerns; the compound has shown up in some regulatory watch lists for cosmetic precursors. Toxicological data is limited, and it carries a lowoderma rating for skin sensitization potential in some assessments.

Skin benefits

  • Provides oxidative hair dyeing capability as a coupler/intermediate

Known concerns

  • Limited toxicological safety data available
  • Environmental concern as a fluorene derivative
  • Potential skin sensitization (lowoderma) in some assessments
  • Restricted in EU cosmetic applications per Annex III

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.