PEG-4 Dimethacrylate

AKA: Tetraethylene glycol dimethacrylate, 109-17-1, TETRAETHYLENEGLYCOL DIMETHACRYLATE, Te EGDMA, Tetraethylene glycol, TGM 4, SR 209, Methacrylic acid, Oxybis(ethyleneoxyethylene) ester, 2-Propenoic acid, Oxybis(2, 1-ethanediyloxy-2, 1-ethanediyl) ester
Synthetic
Occlusive
Not Clean
OriginPEG-4 Dimethacrylate is synthesized from polyethylene glycol (PEG) and methacrylic acid derivatives through chemical synthesis. It is produced by esterification of PEG with methacrylic acid or methacrylate compounds under catalytic conditions.
Poly(oxy-1,2-ethanediyl), .alpha.-(2-methyl-1-oxo-2-propenyl-omega-(2-methyl-1-oxo-2-propenyl)oxy- (4 mol EO average molar ratio)
Formula
C16H26O7
Mol. Weight
330.37
CAS #
109-17-1
Form
Liquid
State
Liquid
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
Functions
Binding
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Holds Formula Together
Creates Protective Barrier
Creates protective layer
Holds ingredients together
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
4
CIR
Safe as used
Pregnancy
Caution
CIR Safety Findings
Not an Eye Irritant
1 study / 1 not irritating (CIR 339)
Not a Sensitizer
1 study / 1 not sensitizing / plus 1 case report (CIR 339)
Skin Irritant in Testing
1 study / 1 irritating / reactions slight (CIR 339)
Concentration Guide
Leave-on6.6–10%
Rinse-offNot reported
0%50%100%
CIR reported use · 2020 survey
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR