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Colorant

Sodium 4-(3-hydroxy-5-methyl-4-phenylazopyrazol-2-yl)benzenesulphonate

CAS 6359-82-6
55

Safety score · 0–100

Moderate

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

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

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, so always read the physical product label and consult a healthcare professional for personal concerns.