Diethyl maleate
Also known as: Maleic acid diethyl ester, Diethyl (2Z)-2-butenedioate, Ethyl maleate, cis-Propenoic acid diethyl ester, (Z)-2-Butenedioic acid diethyl ester, 2-Butenedioic acid (Z)-, diethyl ester, 2-Butenedioic acid, diethyl ester, (2Z)-
Diethyl maleate (CAS 141-05-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H12O4 and a molecular weight of 172.178 g/mol. Key properties include a melting point of −10 °C(lit.), a boiling point of 214.0±0.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 93.3±0.0 °C. It is classified under GHS with signal word Warning and hazard statements H317 — May cause an allergic skin reaction, H319 — Causes serious eye irritation and H412 — Harmful to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 141-05-9
- Jingsj CID
- J-33048-3
- Molecular Formula
- C8H12O4
- Molecular Weight
- 172.178 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | −10 °C(lit.) |
|---|---|
| Boiling Point | 214.0±0.0 °C at 760 mmHg |
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 93.3±0.0 °C |
| Exact Mass | 172.073563 |
| PSA | 52.60000 |
| LogP | 1.68 |
| Additional Property | 5.93 (vs air) |
| Vapor Pressure | 0.2±0.4 mmHg at 25°C |
| Refractive Index | 1.443 |
| Additional Property | insoluble |
GHS Safety & Compliance
- H317 — May cause an allergic skin reaction
- H319 — Causes serious eye irritation
- H412 — Harmful to aquatic life with long lasting effects
Activity & Biological Data
| Additional Information | [1]. Andrea Gille, et al. Nuclear trapping of inactive FOXO1 by the Nrf2 activator diethyl maleate. Redox Biol. 2019 Jan;20:19-27. |
|---|
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 Diethyl maleate?
The CAS number of Diethyl maleate is 141-05-9.
What are the molecular formula and molecular weight of Diethyl maleate?
Diethyl maleate has molecular formula C8H12O4 and molecular weight 172.178 g/mol.
Is Diethyl maleate hazardous?
Diethyl maleate has GHS signal word Warning and hazard statements H317 — May cause an allergic skin reaction; H319 — Causes serious eye irritation; H412 — Harmful to aquatic life with long lasting effects.
What are the upstream and downstream products of Diethyl maleate?
For Diethyl maleate, Upstream Products: Maleic anhydride, Ethanol, Dimethyl acetylenedicarboxylate; Downstream Products: diethyl cis-cyclopropane-1,2-dicarboxylate, Diethyl trans-cyclopropane-1,2-dicarboxylate, trans,trans-Muconic acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Diethyl maleate (CAS 141-05-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-33048-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.