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SOYAMIDOPROPYL ETHYLDIMONIUM ETHOSULFATE

CAS 90529-57-0
72

Safety score · 0–100

Fine

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

About

A conditioning quaternary ammonium ingredient where the fatty chain derives from soy oil, providing substantivity to skin and hair with an ethyl-substituted cationic headgroup.

This ingredient is a quaternary ammonium salt with a soy fatty acid-derived amidopropyl backbone and an ethyl substituent on the nitrogen, reducing charge density compared to trimethylammonium salts. The ethosulfate counterion is mild. Soy-derived fatty chains are predominantly linoleic acid, providing some emolliency. EU CosIng does not list any specific restriction for this ingredient. The ingredient is primarily used in hair conditioning and skin leave-on products. Minor concern for soy allergens given protein-derived components.

Skin benefits

  • Provides long-lasting conditioning deposition on hair and skin
  • Improves flexibility and elasticity of hair fiber
  • Emollient contribution from unsaturated soy fatty acid chains

Known concerns

  • Soy allergen sensitivity in sensitized individuals
  • Mild skin and eye irritation possible at high use levels

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.