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Hair Colorant

HC BLUE NO. 2

CAS 33229-34-4 Updated
35

Safety score · 0–100

Caution

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

About

A semi-permanent blue hair dye in the HC class. PubChem flags multiple irritation and sensitisation hazards, and the broader HC-dye class has had carcinogenicity scrutiny — use only as labelled.

Function

HAIR DYEING

Skin benefits

  • Hair colour deposition

Known concerns

  • Skin/eye irritation
  • Sensitisation H317
  • Aromatic amine hair-dye class scrutiny
  • SCCS-driven restrictions

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.