Diethyl acetylenedicarboxylate
Also known as: 2-Butynedioic acid diethyl ester, Acetylenedicarboxylic acid diethyl ester, Bis(ethoxycarbonyl)acetylene, Diethyl butynedioate, Diethyl 2-butynedioate, diethyl but-2-ynedioate, Diethyl but-2-yne-1,4-dioate
Diethyl acetylenedicarboxylate (CAS 762-21-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C8H10O4 and a molecular weight of 170.163 g/mol. Key properties include a melting point of 1-3 °C, a boiling point of 233.9±0.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 94.4±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 762-21-0
- Jingsj CID
- J-3427-5
- Molecular Formula
- C8H10O4
- Molecular Weight
- 170.163 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 1-3 °C |
|---|---|
| Boiling Point | 233.9±0.0 °C at 760 mmHg |
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 94.4±0.0 °C |
| Exact Mass | 170.057907 |
| PSA | 52.60000 |
| LogP | 2.57 |
| Vapor Pressure | 0.1±0.4 mmHg at 25°C |
| Refractive Index | 1.452 |
| Storage Conditions | 0-6°C |
GHS Safety & Compliance
- H314 — Causes severe skin burns and eye damage
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 acetylenedicarboxylate?
The CAS number of Diethyl acetylenedicarboxylate is 762-21-0.
What are the molecular formula and molecular weight of Diethyl acetylenedicarboxylate?
Diethyl acetylenedicarboxylate has molecular formula C8H10O4 and molecular weight 170.163 g/mol.
Is Diethyl acetylenedicarboxylate hazardous?
Diethyl acetylenedicarboxylate has GHS signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage.
What are the upstream and downstream products of Diethyl acetylenedicarboxylate?
For Diethyl acetylenedicarboxylate, Upstream Products: Ethanol, Acetylenedicarboxylic acid monopotassium salt, Acetylenedicarboxylic acid; Downstream Products: 4-Methylphthalic acid, Ethyl 2-(4-morpholinyl)-4-phenyl-1,3-thiazole-5-carboxylate, 1,1':4',1'':4'',1''':4''',1''''-Quinquephenyl.
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 acetylenedicarboxylate (CAS 762-21-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-3427-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.