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Skin Conditioning

4-ISOBUTYLRESORCINOL

CAS 18979-62-9
62

Safety score · 0–100

Fine

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

A potent skin-brightening tyrosinase inhibitor (sold as Lumiwhite/SymWhite 377 analog). SCCS-reviewed safe at limited percentages, but resorcinol-class sensitization is possible.

Function

ANTIOXIDANT

Skin benefits

  • Tyrosinase-inhibiting brightening agent
  • Effective on hyperpigmentation in studies
  • Stable in formulation

Known concerns

  • Resorcinol derivative — potential thyroid concern
  • Skin sensitization risk in sensitive users
  • SCCS reviews require cap on use level
  • Not for use on broken skin

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.