Colorant
Sodium 4-(3-hydroxy-5-methyl-4-phenylazopyrazol-2-yl)benzenesulphonate
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A pyrazolone-based azo yellow colorant used in rinse-off cosmetic products. The azo bond carries aromatic-amine impurity and sensitization risk, so EU restricts hair-dye applications.
Skin benefits
- Bright yellow pyrazolone azo colorant
- Stable in rinse-off cosmetic bases
Known concerns
- Azo bond carries aromatic-amine impurity risk
- EU restricts hair-dye use
- Possible skin sensitization
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.