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1- Naphthalenol

CAS 90-15-3
40

Safety score · 0–100

Moderate

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

About

Also known as alpha-naphthol, this aromatic phenol is used as a hair dye intermediate but raises concerns due to sensitisation potential and structural alerts for genotoxicity.

1-Naphthalenol (CAS 90-15-3), also called alpha-naphthol, is an aromatic phenol used as an oxidative hair dye intermediate. It is not specifically listed in EU Annex II (prohibited) but has been subject to SCCS safety evaluation. The substance shows structural alerts for sensitisation and potential genotoxicity that have raised concerns in cosmetic safety reviews. Hair dye intermediates of this class are typically restricted to professional use and must be used only in the context of controlled oxidative colouring processes.

Known concerns

  • Skin sensitisation potential
  • Structural alerts for genotoxicity
  • Requires careful safety evaluation
  • Professional use only in oxidative systems

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.