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S-SYRINGOYL ACETYL METHYL CYSTEINATE

78

Safety score · 0–100

Fine

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

About

S-Syringoyl Acetyl Methyl Cysteinate is a cosmetic ingredient used in product formulations. Its specific function may vary between products. Exercise caution due to limited available safety data.

S-Syringoyl Acetyl Methyl Cysteinate is a syringic acid derivative conjugated with a cysteine methyl ester moiety. The compound is used in hair-care and skin-care applications as an antioxidant and conditioning agent. No CAS number is assigned and it is not listed in EU CosIng Annexes with specific restrictions, suggesting it has no identified safety concern at current uses. Its parent compound syringic acid (a phenolic acid) has demonstrated low toxicity in available studies, and the cysteine conjugation is not expected to introduce significant hazard.

Skin benefits

  • Antioxidant properties helping protect skin from oxidative stress
  • Hair and skin conditioning benefits

Known concerns

  • Limited comprehensive toxicological data in public literature
  • No specific EU CosIng restriction entries identified

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.