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Hair Conditioning

DIMETHYL DIACETYL CYSTINATE

CAS 139612-43-4 Updated
78

Safety score · 0–100

Fine

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

About

A cystine-derived hair conditioner. The sulfur bonds in cystine help reinforce the hair fiber, while the acetyl/methyl modifications make it lipid-soluble for better deposition.

Function

HAIR CONDITIONING

Skin benefits

  • Reinforces hair fiber through disulfide-like chemistry
  • Reduces breakage
  • Smooths hair shaft

Known concerns

  • Niche ingredient with limited public toxicology data

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.