Behenyl Methacrylate/t-Butyl Methacrylate Copolymer

AKA: Behenyl methacrylate copolymer

Synthetic

Occlusive

Not Clean

Behenyl Methacrylate/t-Butyl Methacrylate Copolymer is a copolymer of behenyl methacrylate and t-butyl methacrylate monomers

CAS #

-

Form

Liquid

State

Solid

Functions

Film Forming

Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.

Improves Elasticity

Moisturizing

Creates protective layer

Traditional Use

A modern acrylic-based polymer created for cosmetics to provide film-forming and conditioning properties without traditional use history.

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-assessed1 review →

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

Verified Jun 2026

Data: CosIng · EWG · CIR