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Surfactant

SODIUM LAURETH-4 CARBOXYLATE

CAS 33939-64-9 / 38975-04-1
80

Safety score · 0–100

Good

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

A widely used laureth ether carboxylate with 4 ethoxylation units — one of the gentler everyday cleansers, often used as a primary surfactant in sulfate-free shampoos and face washes for sensitive skin.

Function

CLEANSINGFOAMINGSURFACTANT - CLEANSING

Skin benefits

  • Mild cleansing for sensitive skin
  • Lower irritation than equivalent sulfate
  • Good foam quality for daily use

Known concerns

  • Possible 1,4-dioxane traces from ethoxylation
  • Foam less dense than SLES analogs
  • Cost higher than commodity sulfates

References

EU

EU CosIng database

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

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Same plant / compound family

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SODIUM LAURETH-40 SULFATE
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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.