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Antioxidant

PHENYLTHIOGLYCOLIC ACID

CAS 103-04-8 Updated
50

Safety score · 0–100

Moderate

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

About

An aromatic thiol acid used at low % as an antioxidant and reducing agent. Carries skin, eye and respiratory irritation flags and a pungent odor — best left to specialty formulations at low concentrations.

Function

ANTIOXIDANT

Skin benefits

  • Antioxidant via thiol
  • Reducing chemistry

Known concerns

  • Strong odor
  • Skin/eye/respiratory irritation
  • Oxidation byproducts
  • Specialty use

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.