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Colorant

Acid Red 73 (CI 27290), when used as a substance in hair dye products

CAS 5413-75-2 Updated
25

Safety score · 0–100

Caution

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

About

A synthetic azo dye used only in hair dye products under strict EU concentration limits. Sensitization potential and azo-cleavage concerns mean it should not appear outside hair dye use.

Skin benefits

  • Provides red shade in hair dye applications

Known concerns

  • Azo dye class — potential aromatic amine release
  • EU restricted to hair dye use only
  • Skin sensitization potential
  • Not approved for non-hair-dye cosmetics

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.