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Hair Conditioning

SODIUM THIOGLYCOLATE

CAS 367-51-1 Updated
25

Safety score · 0–100

Caution

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

About

A reducing agent used in perms and depilatories to break hair disulfide bonds. Effective but a known skin sensitiser; EU restricts concentration and pH and limits to professional/rinse-off use.

Function

ANTIOXIDANTDEPILATORYHAIR WAVING OR STRAIGHTENINGREDUCING

Skin benefits

  • Reduces hair disulfide bonds for waving and depilatory action
  • Effective at low concentrations

Known concerns

  • Strong skin irritant; sensitiser on repeat exposure
  • GHS H301/H311/H331 — toxic if swallowed/inhaled/in contact with skin
  • Restricted under EU Cosmetics Regulation Annex III
  • Not for leave-on use
  • Can cause severe dermatitis in occupational exposure

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.