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Hair Conditioning

METHYL THIOGLYCOLATE

CAS 2365-48-2 Updated
22

Safety score · 0–100

Caution

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

About

Methyl thioglycolate is a strong-smelling reducing agent used in professional hair perms and relaxers. Irritant and sensitiser; restricted to professional use under EU rules.

Function

HAIR WAVING OR STRAIGHTENING

Skin benefits

  • Reducing agent used in hair-perm/relaxer chemistry
  • Breaks disulfide bonds in hair fibre
  • Specialty depilatory/perm function

Known concerns

  • GHS: harmful if swallowed/inhaled, skin and eye irritant, sensitiser
  • EU restricted in cosmetic perm/relaxer use only with strict %
  • Strong odour and respiratory irritant
  • Not for leave-on cosmetic products

References

EU

EU CosIng database

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

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3-AMINO-2,6-DIMETHYLPHENOL
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PERFLUORONONYL OCTYLDODECYL GLYCOL GRAPESEEDATE
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PERFLUORONONYL OCTYLDODECYL GLYCOL MEADOWFOAMATE
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POTASSIUM THIOGLYCOLATE
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2,4-DIAMINOPHENOL HCL
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4-ETHOXY-M-PHENYLENEDIAMINE
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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.