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Hair Conditioning

POTASSIUM THIOGLYCOLATE

CAS 34452-51-2 Updated
22

Safety score · 0–100

Caution

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

About

Potassium thioglycolate is a thiol used in hair perming and depilatories. Effective but a known irritant and sensitizer; EU restricts it strictly to professional or rinse-off uses.

Function

DEPILATORYHAIR WAVING OR STRAIGHTENING

Skin benefits

  • Effective hair-relaxer/depilatory active
  • Breaks disulfide bonds for waving

Known concerns

  • Strong skin and eye irritant
  • Sensitization and allergic contact dermatitis
  • EU Annex III restricted use only
  • Not for leave-on products

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.