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Surfactant

PEG-9 COCOATE

CAS 61791-29-5
82

Safety score · 0–100

Good

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

About

An ethoxylated coconut fatty acid ester widely used as an emulsifier in cosmetics, with a safety profile similar to other PEG cocoates but requiring purity controls for 1,4-dioxane.

PEG-9 Cocoate (CAS 61791-29-5) is a monoester of coconut fatty acids with polyethylene glycol (9 mol EO average). The SCCS has noted that PEGs must be evaluated for residual ethylene oxide and 1,4-dioxane, which are regulated impurities. At current cosmetic concentrations, PEG-9 Cocoate is considered safe when produced under GMP conditions that control these contaminants, per EU Cosmetics Regulation EC 1223/2009.

Function

SURFACTANT - EMULSIFYING

Skin benefits

  • Reliable emulsification performance
  • Improves product feel and application properties

Known concerns

  • 1,4-dioxane impurity risk if inadequately purified
  • Mild skin and eye irritation potential

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.