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Colorant

Quinolinium, 4- formyl-1-methyl-, salt with 4- methylbenzenesulfonic acid (1:1)

CAS 223398-02-5
48

Safety score · 0–100

Moderate

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

A cationic quinolinium-based dye salt used as a colorant in cosmetics. Limited safety data and EU restrictions above 0.1% mean it warrants formulator caution and low concentration use.

Function

COLORANT

Skin benefits

  • Provides color in cosmetic formulations

Known concerns

  • Cationic quinolinium dye — limited safety data
  • EU restrictions trigger at >=0.1%
  • Possible eye and mucous membrane irritation
  • Sensitization potential not well characterized

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, so always read the physical product label and consult a healthcare professional for personal concerns.