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N,N-Diethyl-m-aminophenol, when used as a substance in hair dye products

CAS 91-68-9 / 68239-84-9
32

Safety score · 0–100

Caution

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

A hair dye intermediate with severe EU restrictions; only permitted at specific concentrations in oxidative hair dye products.

N,N-Diethyl-m-aminophenol is restricted for use exclusively as an oxidative hair dye substance under EU Annex III (entry 18), with a maximum concentration of 2% after mixing. It is listed in the 'hair dye substances for which a test on commercial ready-to-use preparations is recommended' category. The substance is a known skin sensitiser and requires clear warning statements on product labels. Repeated exposure can cause severe allergic contact dermatitis.

Known concerns

  • Skin sensitiser — can cause severe allergic contact dermatitis
  • Restricted to oxidative hair dye use only under EU Annex III
  • Requires specific label warnings per EU cosmetic regulation
  • May be mutagenic at high concentrations

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.