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Emulsifier

ISOSTEARETH-5

CAS 52292-17-8
70

Safety score · 0–100

Fine

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

A low-ethoxylated isostearyl PEG-5 ether used as an oil-phase emulsifier in richer creams. Generally well-tolerated in rinse-off, but the low EO count raises sensitisation potential in some leave-on use.

Function

SURFACTANT - EMULSIFYINGSURFACTANT - CLEANSING

Skin benefits

  • Effective oil-phase emulsifier
  • Compatible with rich, occlusive creams
  • Helps stabilise water-in-oil formulas

Known concerns

  • Possible skin sensitisation in some leave-on uses
  • Possible trace 1,4-dioxane from ethoxylation
  • Low EO count increases lipophilicity

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.