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Surfactant

AMMONIUM ISOSTEARATE

CAS 191880-49-6 Updated
72

Safety score · 0–100

Fine

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

About

The ammonium soap of isostearic acid — a mild surfactant and emulsifier used in cleansers and emulsions. Generally low-risk but can be drying like other soaps.

Function

CLEANSINGSURFACTANT - EMULSIFYINGSURFACTANT - CLEANSING

Skin benefits

  • Mild surfactant in cleansers
  • Emulsion stabilizer
  • Skin-feel modifier
  • pH-adjusted at use

Known concerns

  • Ammonium soaps can dry skin
  • Possible mild irritation at high levels
  • Limited published safety dossier

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.