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Hair Conditioning

DIMETHICONE/MERCAPTOPROPYL METHICONE COPOLYMER

Updated
70

Safety score · 0–100

Fine

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

About

A thiol-containing silicone that bonds to hair through disulfide chemistry, creating exceptionally durable conditioning films. Used at low %; mild caveat for sulfur sensitivity.

Function

FILM FORMINGHAIR CONDITIONINGSKIN CONDITIONING

Skin benefits

  • Bonds via disulfide chemistry for durable films
  • Strong substantivity to keratin
  • Heat-resistant protection
  • Useful for permanent waves

Known concerns

  • Free thiol can have odor
  • Possible mild sensitization from sulfur chemistry
  • Limited public toxicology

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.