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Colorant or Dye

DIETHYLAMINOMETHYLCOUMARIN

CAS 91-44-1
25

Safety score · 0–100

Caution

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

A coumarin-based fluorescent dye, also known as Coumarin 1. Multiple GHS hazard codes for irritation and acute toxicity flag it as poorly suited to cosmetic use, and it is not an approved EU cosmetic colorant.

Skin benefits

  • Used historically as a fluorescent dye and laser dye
  • Provides brightening optical effect in some hair products

Known concerns

  • PubChem GHS classifies it as H312, H315, H319, H332, H335 (multiple irritation and acute toxicity endpoints)
  • Coumarin derivatives raise sensitisation and allergenicity concerns
  • Not on the EU positive list of cosmetic colorants in Annex IV
  • Limited safety data for direct skin contact in leave-on 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, so always read the physical product label and consult a healthcare professional for personal concerns.