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Hair Conditioning

THIOGLYCOLIC ACID

CAS 68-11-1 Updated
18

Safety score · 0–100

Avoid

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

About

A sulfur-containing acid used in depilatories and perms to break hair bonds. Highly corrosive in concentrated form and strictly limited under EU rules.

Function

ANTIOXIDANTDEPILATORYHAIR WAVING OR STRAIGHTENINGREDUCING

Skin benefits

  • Effective at breaking hair disulfide bonds
  • Standard active in depilatories and perms
  • Permitted under EU Annex III with strict caps

Known concerns

  • Strongly corrosive and toxic — GHS H301/H311/H314
  • Severe skin burns and irritation
  • Strict EU concentration limits
  • Not for sensitive/damaged skin

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.