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Hair Conditioning

DIMETHYL CYSTINATE

CAS 1069-29-0 / 78271-08-6 Updated
85

Safety score · 0–100

Good

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

About

The dimethyl ester of cystine, a disulfide-bridged amino acid found naturally in hair keratin. Used as a gentle skin / hair conditioner. Hydrolyses back to cystine in skin; very well tolerated.

Function

ANTISTATICSKIN CONDITIONING

Skin benefits

  • Amino-acid derivative — skin / hair conditioning
  • Disulfide chemistry may support hair structure
  • Mild and biocompatible
  • Compatible with most formulations

Known concerns

  • Disulfide chemistry can be sensitive to oxidising conditions
  • No significant concerns at cosmetic concentrations

References

EU

EU CosIng database

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

Related hair conditionings

85
CYSTINE
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GLYCERYL HYDROXYSTEARATE/OLEATE ESTERS
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METHOXY AMODIMETHICONE/SILSESQUIOXANE COPOLYMER
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PALMITOYL TETRAPEPTIDE-132 OLIGOPEPTIDE-258 AMIDE
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POLYSILICONE-18 STEARATE
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 85
SH-DECAPEPTIDE-13
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 84
DISODIUM AMODIMETHICONE DISUCCINAMIDE
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 84
ETHYL BIOTINATE
Hair Conditioning

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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.