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Surfactant

BUTETH-3 CARBOXYLIC ACID

CAS 75427-76-8 / 107600-34-0
60

Safety score · 0–100

Fine

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

A short-chain ethoxylated alcohol carboxylic acid (alkyl ether carboxylate). Used as a mild surfactant and foam-booster in cleansers. Class is well tolerated; carries the standard PEG dioxane caveat.

Function

SURFACTANT - CLEANSING

Skin benefits

  • Mild anionic surfactant
  • Co-surfactant for sulfate-free systems
  • Foam booster

Known concerns

  • PEG/glycol ether residue concerns
  • Eye irritation in concentrated form
  • Limited cosmetic-specific dossier

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.