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Emulsifier

SODIUM STEARETH-4 PHOSPHATE

CAS 57829-61-5 / 87666-99-7
66

Safety score · 0–100

Fine

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

An ethoxylated stearyl phosphate salt. Used as a mild anionic emulsifier. Generally safe; main caveat is potential trace dioxane from PEG processing.

Function

SURFACTANT - EMULSIFYING

Skin benefits

  • Stable emulsions
  • Mild on skin
  • Wide pH compatibility

Known concerns

  • Trace 1,4-dioxane potential
  • Limited dedicated review

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.