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Surfactant

C20-40 ALKETH-40 (FORMERLY C20-40 PARETH-40)

CAS 246538-83-0 (generic)/ 251553-55-6 (generic)/ 97953-22-5 (generic) Updated
86

Safety score · 0–100

Good

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

About

A long-chain (C20-40) alcohol with 40 ethylene-oxide units — strongly hydrophilic, very mild emulsifier. Large size and high HLB combine for a low-irritation profile.

Function

SURFACTANT - CLEANSINGSURFACTANT - SOLUBILIZING

Skin benefits

  • Mild emulsification
  • Stable O/W systems
  • Low irritation
  • Solubilises oily actives

Known concerns

  • Trace dioxane caveat
  • No significant concerns at cosmetic concentrations

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 — always read the physical product label and consult a healthcare professional for personal concerns.