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Hair Conditioning

STEARYL/BEHENYL BETAINATE MESYLATE

Updated
65

Safety score · 0–100

Fine

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

About

A cationic conditioning surfactant (betaine ester salt) used for softening. Generally well tolerated; mesylate counterion requires low residual control during synthesis.

Skin benefits

  • Cationic surfactant providing softening and conditioning
  • Often used as substitute for less biodegradable quats
  • Good substantivity to hair

Known concerns

  • Cationic surfactants can be eye-irritating in leave-on
  • Mesylate anion safety relies on low residual methanesulfonate
  • Limited public SCCS review for this exact ester

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.