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Surfactant

SODIUM UNDECETH-5 CARBOXYLATE

CAS 84647-78-9
75

Safety score · 0–100

Fine

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

An undecyl ether carboxylate with 5 ethoxylation units — uses an unusual 11-carbon chain that balances cleansing power with reasonable mildness. Less common than laureth-based analogs but in the same gentle ether-carboxylate family.

Function

CLEANSINGSURFACTANT - EMULSIFYINGSURFACTANT - CLEANSING

Skin benefits

  • Effective mid-range cleansing
  • Mild compared to sulfate surfactants
  • Good emulsification properties

Known concerns

  • Possible 1,4-dioxane contamination from synthesis
  • Limited published safety data
  • Variable performance across grades

References

EU

EU CosIng database

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

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Surfactant

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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.