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Hair Conditioning

PEI-45 ISOSTEARAMIDE/STEARAMIDE

70

Safety score · 0–100

Fine

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

A PEI-45 polymer modified with isostearic and stearic fatty acid amides, used mainly in hair conditioning. Class is conservatively yellow because raw PEI carriers can irritate skin and eyes.

Function

HAIR CONDITIONING

Skin benefits

  • Cationic hair-conditioning polymer
  • Improves substantivity
  • Stable in surfactant systems

Known concerns

  • Polyethylenimines can be irritating at higher levels
  • Limited public toxicology for this specific derivative
  • Not commonly used in leave-on facial products

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.