Hair Conditioning
Thioglycolic acid and its salts
Safety score · 0–100
Caution
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A powerful sulfur-containing reducing agent used in hair perming and depilatory products. Acutely toxic and a strong irritant; EU strictly limits concentration and pH and confines it to professional/rinse-off use.
Skin benefits
- Highly effective hair-perming reducer
- Active in depilatories
Known concerns
- Acutely toxic by oral, dermal and inhalation routes
- Skin and severe eye irritant
- Strict EU Annex III concentration and pH limits
- Sensitiser potential
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related hair conditionings
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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.