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Colorant

CI 21100

CAS 5102-83-0 Updated
22

Safety score · 0–100

Caution

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

About

A diarylide yellow pigment subject to dual EU restrictions: Annex IV for general use and Annex II banning hair dye applications. Cleaves to dichlorobenzidine (IARC 2B) under heat — clear avoid.

Function

COLORANT

Skin benefits

  • Diarylide yellow pigment with strong tinctorial strength
  • Limited specialty colorant use under restricted conditions

Known concerns

  • EU Annex II banning use in hair dye products
  • Annex IV restrictions for general cosmetic use
  • Can release 3,3'-dichlorobenzidine (IARC Group 2B) under heat

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.