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Emulsifier

PEG-16 CASTOR OIL

CAS 61791-12-6
72

Safety score · 0–100

Fine

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

PEG-16 castor oil — an ethoxylated castor oil emulsifier and solubilizer. Lower ethoxylation than PEG-40 makes it a milder, more occlusive variant. Cosmetic grade should be purified to remove 1,4-dioxane.

Function

SKIN CONDITIONING - EMOLLIENTSURFACTANT - EMULSIFYING

Skin benefits

  • Mild solubilizer and emulsifier
  • Castor oil emolliency with water-compatibility
  • Lower ethoxylation than PEG-40 castor oil
  • Tolerable in rinse-off and leave-on cosmetics at typical use levels

Known concerns

  • Potential trace 1,4-dioxane from ethoxylation — requires purified cosmetic grade
  • Lower ethoxylation makes it slightly more occlusive than PEG-40
  • Penetration enhancer effect — pair with skin-irritant actives carefully

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.