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SOLVENT BLACK 3

CAS 4197-25-5
45

Safety score · 0–100

Moderate

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

About

A synthetic black azo dye used in cosmetic colorants, restricted in the EU under Annex II/1265 with specific concentration limits.

Solvent Black 3 (CAS 4197-25-5) is a fat-soluble azo dye used in cosmetic formulations for black coloration. It is listed in EU Cosmetics Regulation 1223/2009 Annex II under reference II/1265, indicating restriction in cosmetic use. Azo dyes like Solvent Black 3 may undergo reductive cleavage in the skin or by skin microbiota, potentially releasing aromatic amines of concern. The EU restriction suggests specific safety concerns, possibly related to sensitization or metabolic conversion products. The dye is permitted in some jurisdictions for specific cosmetic applications (e.g., hair dyes at low concentrations) but faces significant EU restrictions for general cosmetic use.

Known concerns

  • EU Annex II restricted (II/1265)
  • Azo dye with potential for carcinogenic amine release
  • Skin sensitization concern
  • Limited permitted use in EU cosmetics

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.