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Colorant

CI 42100

CAS 4857-81-2 Updated
50

Safety score · 0–100

Moderate

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

About

CI 42100 (Acid Green 50, Light Green SF) — same chlorinated triphenylmethane compound as 22617. EU Annex IV listing permits rinse-off use within concentration limits, with sensitization caveats.

Function

COLORANT

Skin benefits

  • Provides green shading in cosmetic colorants
  • EU-permitted under Annex IV with restrictions

Known concerns

  • Restricted to rinse-off products in EU
  • Triphenylmethane sensitization potential
  • Concentration limits and product-type restrictions
  • Chlorinated structure

References

EU

EU CosIng database

European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.

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Check your shelf

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Scan any cosmetic product with LuxSense to see if it contains CI 42100 and get a full ingredient breakdown with safety scores.

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.