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Trisodium 3-hydroxy-4-(4'-sulphonatonaphthylazo)naphthalene-2,7-disulphonate

CAS 642-59-1; 915-67-3
56

Safety score · 0–100

Moderate

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

About

An acid azo dye (CI 18055 / Acid Red 44) used for coloring cosmetic products. Like other azo colorants, it carries a theoretical concern for reductive cleavage and amine release under specific conditions.

This trisodium azo dye is used for cosmetic coloration purposes. The multiple sulfonate groups enhance water solubility and are characteristic of acid dyes used in hair coloring and certain color cosmetic applications. Azo bond reduction to aromatic amines is the primary regulatory concern for this class, though many approved azo colorants have extensive safety data supporting their cosmetic use. The ingredient is not specifically restricted under EU CosIng beyond general cosmetic safety provisions. No GHS hazard statements were provided in the source data, suggesting acceptable safety at current usage levels.

Skin benefits

  • Provides red/pink coloration in cosmetic products
  • Used in hair dyes and color cosmetics
  • Water-soluble with good color stability

Known concerns

  • Azo dye theoretical concern for reductive cleavage to aromatic amines
  • General dye sensitization potential
  • Environmental concern for aquatic toxicity
  • Ensure compliance with EU approved colorant list

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.