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Hair Colorant

HC BLUE NO. 16

CAS 502453-61-4 Updated
42

Safety score · 0–100

Moderate

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

About

A direct (semi-permanent) blue hair dye. Like other hair dyes it can sensitize and is harmful if swallowed; mainly a concern in DIY misuse and rinse-off design.

Function

HAIR DYEING

Skin benefits

  • Provides bright blue color in oxidative and direct hair dyes

Known concerns

  • GHS H302 — harmful if swallowed
  • Skin and eye irritation potential
  • H412 toxic to aquatic life with long lasting effects
  • Hair-dye sensitizer class — patch test essential

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.