2,3-NAPHTHALENEDIOL

Other

3

Avoid

CAS Number: 92-44-4

About 2,3-NAPHTHALENEDIOL

A synthetic hair dye colorant that falls into the highest-concern bucket because the EU bans it from cosmetic use.

Detailed Analysis

This ingredient is used as a hair dye colorant, but its Annex II listing means it is not allowed in EU cosmetics. Hair-dye materials in this class are also more likely than ordinary skincare ingredients to irritate skin or trigger allergy, so a very low score is the cautious call.

What It Does

HAIR DYEING

Known Concerns

  • ⚠ EU banned for cosmetic use
  • ⚠ Hair dye sensitization risk
  • ⚠ May irritate skin or eyes
  • ⚠ Harmful if swallowed
  • ⚠ May irritate skin
  • ⚠ Can cause serious eye damage
  • ⚠ May irritate eyes
  • ⚠ May irritate the respiratory tract

Safety Score

3

Avoid

Based on EU regulatory data, published safety research, and ingredient function analysis.

References

🏛

EU CosIng Database

European Commission cosmetic ingredient registry

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This information is for educational purposes only and does not constitute medical advice. Always consult a healthcare professional for skin concerns or allergies.