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Colorant

ACID RED 33

CAS 3567-66-6 Updated
50

Safety score · 0–100

Moderate

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

About

An azo-class red dye used in cosmetics like lipsticks and rinse-off products. Approved in the EU at low percentages with some application restrictions.

Function

HAIR DYEING

Skin benefits

  • Cosmetic pink/red colorant
  • Approved in EU Annex IV
  • Used at very low concentrations

Known concerns

  • Azo dye class
  • Possible sensitiser
  • Restricted to specific cosmetic applications

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.