Butyl Acrylate/Isopropylacrylamide/PEG-18 Dimethacrylate Crosspolymer
molecular structure · PubChem
AKA: Acrylic Crosspolymer
Synthetic
Occlusive
Emulsifier
Skin Conditioner
Not Clean
Butyl Acrylate/Isopropylacrylamide/PEG-18 Dimethacrylate Crosspolymer is a crosslinked copolymer of butyl acrylate, isopropylacrylamide and PEG-18 dimethacrylate monomers
CAS #
-
State
Solid
Functions
Emulsion Stabilising
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
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 complex synthetic crosspolymer developed in the late 20th century for cosmetic use as a film-former and stabilizer. Designed to provide improved texture and water resistance in skincare and makeup products.
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
medical-approval
all-shades-safe
Mild Irritant
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