5-HYDROXYVANILLIN

Other

52

Moderate

CAS Number: 3934-87-0

About 5-HYDROXYVANILLIN

A hair-dye intermediate with explicit irritation flags, so it lands firmly in the caution range.

Detailed Analysis

This is a specialty hair-color ingredient with supplied hazard data showing skin irritation, serious eye irritation, and respiratory irritation potential. That is enough to put it clearly below the comfort range for leave-on skin ingredients even if it may still be usable under controlled hair-dye conditions.

What It Does

HAIR DYEING

Known Concerns

  • ⚠ Can irritate skin and eyes
  • ⚠ May irritate airways as dust or aerosol
  • ⚠ Can irritate skin or eyes
  • ⚠ May irritate the respiratory tract

Safety Score

52

Moderate

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.