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BIS-PEG-18 DISILOXANE

83

Safety score · 0–100

Good

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

About

A PEG-modified siloxane that combines the smooth, spreadable feel of silicone with the humectant hydration properties of polyethylene glycol — creating a water-soluble silicone conditioner.

Bis-PEG-18 Disiloxane is a disiloxane (two silicon atoms) backbone end-blocked with an average of 18 moles of ethylene oxide per terminal group. This structure gives the molecule both silicone-like sensory properties (smooth, silky spread, non-greasy) and water solubility due to the extensive PEG chains. PEG-modified silicones are used as conditioners, emulsifiers, and skin-feel modifiers in skin care, hair care, and color cosmetic products. They are generally well-tolerated and do not have the occlusive or comedogenic tendencies of pure dimethicone fluids. No EU restrictions.

Skin benefits

  • Conditions skin — provides silky, smooth feel
  • Water-soluble — washes off easily
  • Improves product spreadability
  • Non-occlusive — comfortable for daily use

Known concerns

  • PEG component may carry 1,4-dioxane contamination risk (low in modern manufacturing)
  • Silicone component may build up on hair with repeated use

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.