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Emulsifier

C11-21 ALKETH-3 (FORMERLY C11-21 PARETH-3)

CAS 246538-82-9 (generic)
74

Safety score · 0–100

Fine

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

A wide-cut C11-21 fatty alcohol with only 3 EO units — used as a co-emulsifier in oil-rich systems. Falls under CIR alkyl-ether family clearance; yellow rather than green because low EO leans more lipid than surfactant.

Function

SURFACTANT - EMULSIFYING

Skin benefits

  • Lipophilic co-emulsifier for rich oil blends
  • Improves emulsion creaminess
  • Useful in W/O formulas

Known concerns

  • Low EO means more lipid-like behavior
  • Trace 1,4-dioxane control needed
  • Not a stand-alone emulsifier

References

EU

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

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C11-21 ALKETH-3
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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.