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Antioxidant

THIOSALICYLIC ACID

CAS 147-93-3 Updated
50

Safety score · 0–100

Moderate

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

About

A thiol-bearing aromatic acid used as a keratolytic and antioxidant. Notable as a thimerosal-related sensitizer — known to trigger contact allergy in thimerosal-allergic individuals. Use with awareness.

Function

ANTIOXIDANTKERATOLYTICREDUCING

Skin benefits

  • Antioxidant via thiol chemistry
  • Used in keratolytic and hair-care formulations
  • Building block for thimerosal-related chemistry

Known concerns

  • Documented skin sensitizer (cross-reacts with thimerosal allergy)
  • Cosmetic dossier is limited
  • Pungent thiol odor
  • Unstable to oxidation

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.