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Hair Conditioning

1-NAPHTHOL

CAS 90-15-3
30

Safety score · 0–100

Caution

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

A hair dye coupler used in permanent oxidative hair color. SCCS has cleared limited rinse-off use, but it is a known skin sensitizer with acute toxicity hazards.

Skin benefits

  • Hair dye coupler used in oxidative colorants

Known concerns

  • Skin sensitizer with positive patch-test data
  • Acute toxicity if swallowed (GHS H302/H311)
  • SCCS reviewed only for rinse-off hair dye use

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, so always read the physical product label and consult a healthcare professional for personal concerns.