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Conditioning Quaternary / Esterquat

DIOLEOYLETHYL HYDROXYETHYLMONIUM METHOSULFATE

CAS 155042-51-6
72

Safety score · 0–100

Fine

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

An esterquat hair conditioning agent based on oleic acid. It delivers softness and detangling with a more biodegradable profile than older quats, while keeping typical cationic surfactant caveats.

Skin benefits

  • Esterquat conditioning agent for hair softness and detangling
  • Reduces static and improves wet comb
  • More readily biodegradable than older quaternary ammonium conditioners
  • Compatible with sulfate-free and natural surfactant systems

Known concerns

  • Cationic surfactants can be eye irritants
  • May cause mild scalp irritation in sensitive users
  • Build-up potential on hair with frequent use

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, so always read the physical product label and consult a healthcare professional for personal concerns.