Methoxy PEG-13 Ethyl Polysilsesquioxane
AKA “Silicone Polymer, Film Former
Humectant
Ingredient Facts
Methoxy peg-13 ethyl polysilsesquioxane
AKA: Silicone Polymer, Film Former
Humectant · Humectant · EWG: 4
Synthetic
Humectant
Silicone
Not Clean
Methoxy PEG-13 Ethyl Polysilsesquioxane is a cosmetic ingredient used as humectant. Assessed as safe by the CIR.
CAS #
-
Form
Liquid
See origin →
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
Traditional Use
A synthetic silicone polymer developed for cosmetics in the late 20th century. Designed to improve product texture, spreadability, and to create a smooth, matte finish on skin.
Skin Types
all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Structural Similarity-Induced Inter-Component Interaction in Silicone Polymer-Based Composite Sunscreen Film for Enhanced UV Protection.
Chen Y, Xu H, Liu Y, Fu Q, Zhang P et al.
Polymers, 2024
Structural Similarity-Induced Inter-Component Interaction in Silicone Polymer-Based Composite Sunscreen Film for Enhanced UV Protection.
Chen Y, Xu H, Liu Y, Fu Q, Zhang P et al.
Polymers, 2024
Structural Similarity-Induced Inter-Component Interaction in Silicone Polymer-Based Composite Sunscreen Film for Enhanced UV Protection.
Chen Y, Xu H, Liu Y, Fu Q, Zhang P et al.
Polymers, 2024
Structural Similarity-Induced Inter-Component Interaction in Silicone Polymer-Based Composite Sunscreen Film for Enhanced UV Protection.
Chen Y, Xu H, Liu Y, Fu Q, Zhang P et al.
Polymers, 2024
Structural Similarity-Induced Inter-Component Interaction in Silicone Polymer-Based Composite Sunscreen Film for Enhanced UV Protection.
Chen Y, Xu H, Liu Y, Fu Q, Zhang P et al.
Polymers, 2024
Methoxy PEG-13 Ethyl Polysilsesquioxane
European Commission
EU Cosmetic Ingredient Database (CosIng)
Verified Jun 2026
Data: CosIng · EWG · CIR