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Colorant

INDOCYANINE GREEN

CAS 3599-32-4 Updated
68

Safety score · 0–100

Fine

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

About

A near-infrared absorbing cyanine dye — long used as an injectable medical diagnostic agent. EU Annex IV-listed for cosmetic colorant use and one of the better-characterized dye molecules in regulation.

Function

UV ABSORBER

Skin benefits

  • Approved medical diagnostic dye with extensive safety record
  • NIR absorber useful in specialty UV/imaging applications
  • EU Annex IV listed colorant

Known concerns

  • Iodine content can trigger allergy in iodide-sensitive individuals
  • Specialty use rather than mainstream cosmetic dye
  • Higher cost limits everyday formulation use

References

EU

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.