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5-Amino-o-cresol

CAS 2835-95-2
62

Safety score · 0–100

Fine

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

Amino-o-cresol is a cosmetic ingredient used in product formulations. Its specific function may vary between products. Exercise caution due to limited available safety data.

5-Amino-o-cresol (4-amino-2-hydroxytoluene) is an amino phenol hair dye precursor used in oxidative hair dye systems. It is listed in EU Annex III of Regulation 1223/2009, restricting its maximum concentration and requiring specific warning statements. Like other oxidative hair dye precursors, it may form sensitizing oxidation products upon mixing with hydrogen peroxide, and IFRA has issued usage restrictions for this compound class in fragrance applications.

Skin benefits

  • Hair dye precursor for oxidative coloration

Known concerns

  • EU Annex III restrictions for hair dye use
  • Potential sensitization on oxidation
  • IFRA restrictions apply

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.