Colorant
Disodium 3-hydroxy-4-[(E)-(4- methyl-2-sulfonatophenyl)diazenyl]-2-naphthoate
Safety score · 0–100
Avoid
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
An industrial sulfonated azo colorant, not approved for cosmetic use in the EU. Azo dyes can release aromatic amines and carry sensitizer/genotoxicity concerns.
Skin benefits
- No legitimate cosmetic benefit
Known concerns
- Industrial-grade azo colorant
- Aromatic-amine release on reduction
- Not on EU cosmetic colorants positive list
- Sensitizer potential
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.