tert-Butyl ethyl malonate

Also known as: 1-tert-Butyl 3-ethyl malonate, 3-O-tert-butyl 1-O-ethyl propanedioate, Ethyl 2-methyl-2-propanyl malonate, Malonic acid tert-butyl ethyl ester, Malonsaeure-tert-butylethylester, Propanedioic acid, 1,1-dimethylethyl ethyl ester, T-butyl ethyl malonate, ethyl 3-tert-butoxy-3-oxopropanoate, monoethyl tert-butyl malonate, tert-butyl ethyl propanedioate, Tert-butyl ethyl propanedioate

tert-Butyl ethyl malonate (CAS 32864-38-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C9H16O4 and a molecular weight of 188.221 g/mol. Key properties include a boiling point of 210.7±0.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 87.2±0.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 32864-38-3
Jingsj CID: J-33062-1
Molecular Formula: C₉H₁₆O₄
Molecular Weight: 188.221 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	210.7±0.0 °C at 760 mmHg
Density	1.0±0.1 g/cm3
Flash Point	87.2±0.0 °C
Exact Mass	188.104858
PSA	52.60000
LogP	1.40
Vapor Pressure	0.2±0.4 mmHg at 25°C
Refractive Index	1.427

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 tert-Butyl ethyl malonate?

The CAS number of tert-Butyl ethyl malonate is 32864-38-3.

What are the molecular formula and molecular weight of tert-Butyl ethyl malonate?

tert-Butyl ethyl malonate has molecular formula C9H16O4 and molecular weight 188.221 g/mol.

What are the upstream and downstream products of tert-Butyl ethyl malonate?

For tert-Butyl ethyl malonate, Upstream Products: Ethyl hydrogen malonate, tert-Butanol, Ethyl malonyl chloride; Downstream Products: Ethyl 3-(2-furyl)-3-oxopropanoate, 3-tert-Butoxy-3-oxopropanoic acid, Ethyl acetoacetate.

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

Last updated: 8/21/2026

How to cite: Jingsj. "tert-Butyl ethyl malonate (CAS 32864-38-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-33062-1 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.