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
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
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
Traditional Use
Synthetic polymer developed in the cosmetics industry as a film-forming agent and texture modifier, created to improve the spreadability and staying power of cosmetic products.
EWG
4
CIR
Safe as used
Pregnancy
Caution
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Skin Types
all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
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.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR