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Colorant

CI 42045

CAS 129-17-9 Updated
55

Safety score · 0–100

Moderate

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

About

A synthetic blue triphenylmethane colorant (CI 42045, Patent Blue V) — EU-permitted as a general cosmetic colorant but banned for hair dyes and not allowed near eyes or mucous membranes.

Function

COLORANT

Skin benefits

  • EU-permitted blue triphenylmethane colorant
  • Provides intense blue shade in cosmetic formulations

Known concerns

  • Banned for hair dye use due to insufficient safety data
  • Not permitted near eyes or mucous membranes
  • Triphenylmethane class sensitization concerns
  • Concentration restrictions under EU Annex IV

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.