Colorant
Acid Orange 24 (CI 20170), when used as a substance in hair dye products
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 limited by EU law to hair dye use only. Documented sensitizer with concerns over potential aromatic amine release; should not appear in non-hair-dye products.
Skin benefits
- Provides orange/brown shade in hair dye
Known concerns
- Azo dye — potential aromatic amine release
- Documented strong skin sensitizer
- EU restricted to hair dye use only
- Not permitted in other cosmetic categories
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related colorants
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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.