Methyl methacrylate crosspolymer

Methyl methacrylate crosspolymer 1
photograph
AKA: Polymethyl methacrylate, PMMA, Acrylic polymer
Synthetic
Occlusive
Clean
OriginDerived from methyl methacrylate and other acrylic monomers within the synthetic polymer chemical family. Synthesized through free radical polymerization of methyl methacrylate with crosslinking agents to form the copolymer network.
2-Propenoic acid, 2-methyl-, 1,2-ethanediyl ester, polymer with methyl 2-methyl-2-propenoate
CAS #
25777-71-3
Form
Liquid
State
Solid
Skin Types
●all-skin-types, gentle
Best For
General
Pregnancy & Breastfeeding Safe
Caution
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Creates Protective Barrier
Fights Bacteria
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
2
CIR
Safe as used
Pregnancy
Caution
CIR Safety Findings
Not an Eye Irritant
1 study / 1 not irritating (CIR 468)
Not a Skin Irritant
1 study / 1 not irritating (CIR 468)
Not a Sensitizer
1 study / 1 not sensitizing (CIR 468)
Concentration Guide
Leave-on0.0001–13%
Rinse-off0.12%
0%50%100%
CIR reported use · 2018 survey
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: CosIng · EWG · CIR