Polydimethylsiloxy PPG-13 Butyl Ether Silsesquioxane

AKA: Silicone Resin, Hybrid Silicone

Synthetic

Humectant

Cleanser

Skin Conditioner

Hair Care

Not Clean

Polymer of dimethyl silsesquioxanes and polypropylene glycol butyl ester

CAS #

-

Form

Liquid

Functions

Hair Conditioning

A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.

Humectant

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

Cleansing

Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.

Locks In Moisture

Traditional Use

A specialized silicone polymer developed for high-performance cosmetics in recent decades. Used as a conditioning agent and film former in hair care and skin products.

EWG

CIR

Safe as used

Pregnancy

Yes

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

⚖️Regulatory1 listing →

🛡️Safety-assessed1 review →

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

Verified Jun 2026

Data: CosIng · EWG · CIR