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Skin Conditioning

POTASSIUM METHOXYSALICYLATE

CAS 152312-71-5 Updated
78

Safety score · 0–100

Fine

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

About

4MSK — a methoxy salicylate brightener approved as a Japanese quasi-drug active. Lightens dark spots without the leukoderma risk of harsher depigmenters; well-tolerated overall.

Function

BLEACHING

Skin benefits

  • 4MSK — established skin-brightening active
  • 20+ years of approved use in Japanese quasi-drugs
  • Targets melanin and hyperpigmentation

Known concerns

  • Mild salicylate — may irritate very sensitive skin
  • Label warning required excluding under-3 use
  • Potential photosensitivity in some formulations

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.