Isobutyl/Methoxy PEG-10 Polysilsesquioxane
AKA “Silicone Crosspolymer, Silica Crosspolymer
Synthetic
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Ingredient Facts
Isobutyl/methoxy peg-10 polysilsesquioxane
AKA: Silicone Crosspolymer, Silica Crosspolymer
Synthetic · Viscosity Controlling | Film Forming | Skin Conditioning · EWG: 4
Plant-Derived
Occlusive
Skin Conditioner
Silicone
Synthetic
Not Clean
Isobutyl/Methoxy PEG-10 Polysilsesquioxane is the Methoxy PEG-10 derivative of Isobutyl Polysilsesquioxane. Science: Functions: Viscosity Controlling Safety Ratings: CIR: Safe as used
Form
Powder
Plant-Derived
Synthetic. Synthesized from silicone-based polysilsesquioxane compounds combined with polyethylene glycol (PEG) and isobutyl/methoxy functional groups. Produced through controlled condensation and polymer cross-linking reactions to create a branched silicone-polymer hybrid structure.
Function
Viscosity Controlling | Film Forming | Skin Conditioning
Benefits
Controls Viscosity
Traditional Use
Modern hybrid silicone-polymer blend developed for cosmetics in the late 20th century. Designed to combine the light feel of silicones with enhanced water-solubility for improved product performance.
Skin Types
all-skin-types
Best For
Target
General
Melanin-Rich Skin
Suitable
Pregnancy Safe
Yes
EWG Score4
CIR Safety Findings
medical-approval, all-shades-safe, Not a Sensitizer
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR