Methoxy PEG-13 Ethyl Polysilsesquioxane

AKA: Silicone Polymer, Film Former

Synthetic

Humectant

Not Clean

OriginSynthesized from silicone polymers and polyethylene glycol (PEG) starting materials through chemical coupling. Created via condensation reactions that bond silsesquioxane cores with methoxy and ethyl-PEG functional groups.

Methoxy PEG-13 Ethyl Polysilsesquioxane is a cosmetic ingredient used as humectant. Assessed as safe by the CIR.

CAS #

-

Form

Liquid

Skin Types

●all-skin-types

Best For

General

Pregnancy & Breastfeeding Safe

Yes

Functions

Humectant

A moisture magnet. Pulls water from the air and deeper skin layers up to the surface to keep skin plump and hydrated.

Locks In Moisture

The paper trail

🔬Peer-reviewednone on file

⚖️Regulatory1 listing →

🛡️Safety-assessed1 review →

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

EWG

CIR

Safe as used

Pregnancy

Yes

Restricted By

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

Concentration Guide

CIR lists it as not reported to be in use.

CIR · report published 2014

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Verified Jun 2026

Data: CosIng · EWG · CIR