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4-BUTYLRESORCINOL

CAS 18979-61-8
58

Safety score · 0–100

Moderate

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

About

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

4-Butylresorcinol is an alkyl-substituted phenolic compound with documented antimicrobial and tyrosinase-inhibiting (skin brightening) activity. It is used in some oxidative hair dye formulations and skin-lightening cosmetic products. The phenolic structure raises skin sensitization concerns at higher concentrations, and alkyl resorcinols in this class are typically restricted in EU cosmetic applications to limit sensitization risk. Not listed in Annex II but subject to general cosmetic safety assessment requirements.

Skin benefits

  • Tyrosinase inhibition for skin brightening
  • Antimicrobial preservative properties
  • Used in oxidative hair dye formulations

Known concerns

  • Skin sensitization potential from phenolic structure
  • EU general cosmetic safety assessment required
  • Concentration-limited use due to irritation potential

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 — always read the physical product label and consult a healthcare professional for personal concerns.