Oxidative hair dye coupler
2-AMINO-5-ETHYLPHENOL HCL
Safety score · 0–100
Caution
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A reddish-brown hair dye intermediate used only in oxidative colourants. EU regulators classify aminophenol couplers as known skin sensitisers and cap them tightly; they are not for skincare use.
Skin benefits
- Used as a coupler in oxidative permanent hair dyes to develop reddish-brown shades
- Permitted in salon and home hair colour within EU concentration limits
Known concerns
- Aminophenol hair dyes are recognised skin sensitisers under EU SCCS opinions
- Hair-dye exposure can trigger allergic contact dermatitis, sometimes severe
- Restricted to professional/consumer hair-colour use with maximum concentrations under EU Annex III
- Not permitted in eyelash or eyebrow products without separate authorisation
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
Related oxidative hair dye couplers
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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.