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Antioxidant

THIOGLYCERIN

CAS 96-27-5
65

Safety score · 0–100

Fine

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

A sulfur-containing glycerin variant — works as a reducing agent and antioxidant. Used in permanent wave systems and oxidation-sensitive formulas; characteristic sulfur smell at higher levels.

Skin benefits

  • Reducing agent useful in hair waving/relaxers
  • Antioxidant in some emulsions
  • Stabilizes formulas against oxidative changes

Known concerns

  • Sulfur smell/odor profile
  • Skin irritation potential with extended exposure
  • Reducing chemistry — incompatible with some actives

References

EU

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

PC

PubChem

U.S. NIH compound data, GHS hazard codes and toxicity literature.

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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.