murphyTrimethylolpropane Trimethacrylate
AKA: 3290-92-4, Acryester TMP, Chemlink 30, TMPTMA, Blemmer PTT, Light Ester TMP, Perkalink 400, NK Ester TMPT, Sartomer 350
Synthetic
Occlusive
Not Clean
OriginDerived from trimethylolpropane and methacrylic acid, both petroleum-based chemical compounds. Synthesized through esterification reaction between the hydroxyl groups and methacrylic acid monomers.
2-Propenoic acid, 2-methyl-, 2-ethyl-2-[[2-methyl-1-oxo-2-propenyl)oxy]methyl]-1,3-propanediyl ester
Formula
C18H26O6
Mol. Weight
338.40
CAS #
3290-92-4
Form
Powder
State
Liquid; Dry Powder; NKRA
Skin Types
●all-skin-types
Best For
General
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
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
5
CIR
Safe as used
Pregnancy
—
CIR Safety Findings
Mixed Eye Irritation Results
2 studies / 1 irritating / 1 not irritating / reactions minimal (CIR 339)
Mixed Skin Irritation Results
7 studies / 6 irritating / 1 mixed / reactions minimal to moderate (CIR 339)
Mixed Sensitization Results
6 studies / 3 sensitizing / 3 not sensitizing / reactions strong (CIR 339)
Concentration Guide
Leave-on25.3%
Rinse-offNot reported
0%50%100%
CIR reported use · 2020 survey
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR