Isobutyl/Methoxy PEG-10 Polysilsesquioxane

AKA: Silicone Crosspolymer, Silica Crosspolymer

Synthetic

Silicone

Not Clean

Isobutyl/Methoxy PEG-10 Polysilsesquioxane is the Methoxy PEG-10 derivative of Isobutyl Polysilsesquioxane.

Form

Powder

Functions

Viscosity Controlling

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.

EWG

CIR

Safe as used

Pregnancy

Yes

Restricted By

Credo Beauty Whole Foods Premium Body Care Beauty Heroes MADE SAFE EWG VERIFIED

CIR Safety Findings

Not a Sensitizer

medical-approval

all-shades-safe

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Skin Types

●all-skin-types

Best For

General

Pregnancy & Breastfeeding Safe

Yes

The paper trail

🔬Peer-reviewednone on file

⚖️Regulatory0 listings

🛡️Safety-assessed1 review →

Counts, not a verdict. A listing isn't a study. The trail, you decide.

Verified Jun 2026

Data: CosIng · EWG · CIR