6-HYDROXYINDOLE

38

Caution

CAS Number: 2380-86-1

About 6-HYDROXYINDOLE

A hair dye precursor restricted under EU Annex III/209 with environmental and sensitisation hazard concerns.

Detailed Analysis

6-Hydroxyindole is a heterocyclic compound used as an oxidation hair dye intermediate, specifically for grey/black colouring. It is restricted under EU Annex III/209 of Regulation (EC) No 1223/2009. Classified as acute toxicity (H302), skin sensitiser (H317), serious eye damage (H318) and aquatic hazard (H411) under CLP Regulation. PubChem safety score is 40.

Skin Benefits

  • ✓ Hair dye precursor for dark shades

Known Concerns

  • ⚠ EU Annex III/209 restricted hair dye precursor
  • ⚠ Skin sensitiser (H317)
  • ⚠ Serious eye damage (H318)
  • ⚠ Aquatic hazard (H411)

Safety Score

38

Caution

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

References

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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.