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Hair Conditioning

GLYCERYL THIOGLYCOLATE

CAS 30618-84-9 Updated
28

Safety score · 0–100

Caution

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

About

A thioglycolate ester used in acid (cold) perms. Known as one of the strongest cosmetic-derived skin sensitizers and a major cause of stylist contact dermatitis; EU-restricted.

Function

HAIR WAVING OR STRAIGHTENING

Skin benefits

  • Effective hair-perming agent at acid pH

Known concerns

  • Strong skin sensitizer — known cause of allergic contact dermatitis
  • Restricted in EU (Annex III)
  • Inappropriate for leave-on cosmetics
  • Significant occupational hazard for stylists

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.