Dimethiconol/Silsesquioxane Copolymer

AKA: Silicone Copolymer

Synthetic

Skin Conditioner

Hair Care

Clean

Siloxanes and silicones, di-Me, polymers with Me silsesquioxanes, hydroxy-terminated

CAS #

68554-67-6

Form

Liquid

State

Solid

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.

Skin Conditioning

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

Locks in moisture

Traditional Use

A modern silicone copolymer developed for cosmetic formulations to improve texture, water-resistance, and durability in makeup and skincare 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

Skin Types

●all-skin-types

Best For

General

Pregnancy & Breastfeeding Safe

Yes

The paper trail

🔬Peer-reviewednone on file

⚖️Regulatory1 listing →

🛡️Safety-assessed2 reviews →

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

Verified Jun 2026

Data: CosIng · EWG · CIR