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azo lake pigment

Calcium bis[3-hydroxy-4-(phenylazo)-2-naphthoate]

CAS 6371-76-2
40

Safety score · 0–100

Moderate

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

A calcium lake of an azo naphthoate pigment used for stable red color in some color cosmetics. It is allowed only under strict purity controls and use restrictions in EU cosmetic regulation.

Skin benefits

  • Calcium lake pigment providing a stable red color
  • Used in some color cosmetics for vivid pigmentation
  • Insoluble lake form reduces skin penetration

Known concerns

  • Azo dye structure that can theoretically cleave to aromatic amines
  • EU Annex IV permits only specific lakes with strict purity criteria
  • Not approved for all cosmetic uses including lip and mucous membrane in some regions
  • Heavy metal and aromatic amine impurities must be controlled

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.