Ethoxylated trimethylolpropane triacrylate

乙氧基化三羟甲基丙烷三丙烯酸酯

Also known as: Trimethylolpropane ethoxylate triacrylate, TMP3EOTA, EO-TMPTA, ETPTA, Trimethylolpropane triethoxylate triacrylate, Trimethylolpropane polyoxyethylene triacrylate, 2-(2,2-Bis{[2-(acryloyloxy)ethoxy]methyl}butoxy)ethyl acrylate, 2-(2,2-bis{[2-(acryloyloxy)ethoxy]methyl}butoxy)ethyl prop-2-enoate, Ethoxylated3 trimethylolpropane triacrylate, A-TMPT 3EO, A-TMPT 9EO

Ethoxylated trimethylolpropane triacrylate (CAS 28961-43-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C21H32O9 and a molecular weight of 428.473 g/mol. It is also known as Trimethylolpropane ethoxylate triacrylate, TMP3EOTA and EO-TMPTA. Key properties include a boiling point of 498.5±45.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 212.2±28.8 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 28961-43-5
Jingsj CID: J-20918-0
Molecular Formula: C₂₁H₃₂O₉
Chinese Name: 乙氧基化三羟甲基丙烷三丙烯酸酯
Molecular Weight: 428.473 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	498.5±45.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	212.2±28.8 °C
Exact Mass	428.204620
PSA	106.59000
LogP	2.79
Vapor Pressure	0.0±1.3 mmHg at 25°C
Refractive Index	1.471

GHS Safety & Compliance

IrritantSignal word: Warning

H315 — Causes skin irritation
H319 — Causes serious eye irritation
H335 — May cause respiratory irritation

Activity & Biological Data

Additional Information	[1]. Matin Ashurov, et al. Surface-enhanced Raman scattering in ETPTA inverse photonic crystals with gold nanoparticles. Phys Chem Chem Phys. 2021 Sep 6.

Customs & Trade Information

HS Code	2917190090
Summary	2917190090 acyclic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Ethoxylated trimethylolpropane triacrylate?

The CAS number of Ethoxylated trimethylolpropane triacrylate is 28961-43-5.

What are the molecular formula and molecular weight of Ethoxylated trimethylolpropane triacrylate?

Ethoxylated trimethylolpropane triacrylate has molecular formula C21H32O9 and molecular weight 428.473 g/mol.

Is Ethoxylated trimethylolpropane triacrylate hazardous?

Ethoxylated trimethylolpropane triacrylate has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Ethoxylated trimethylolpropane triacrylate (CAS 28961-43-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-20918-0 (accessed 2026-10-28).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.