Dimethyl acetylenedicarboxylate
Also known as: Dimethyl but-2-ynedioate, Acetylenedicarboxylic acid dimethyl ester, 2-Butynedioic acid dimethyl ester, 1,2-Acetylenedicarboxylic acid dimethyl ester, 1,2-Ethynedicarboxylic acid dimethyl ester, Ethyne-1,2-dicarboxylic acid dimethyl ester, Dimethyl 2-butynedioate, Dimethyl But-2-yne-1,4-dioate, DMAD
Dimethyl acetylenedicarboxylate (CAS 762-42-5) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H6O4 and a molecular weight of 142.109 g/mol. Key properties include a melting point of -18 °C, a boiling point of 204.3±0.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 86.1±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed and 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.
- 762-42-5
- Jingsj CID
- J-3391-0
- Molecular Formula
- C6H6O4
- Molecular Weight
- 142.109 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -18 °C |
|---|---|
| Boiling Point | 204.3±0.0 °C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 86.1±0.0 °C |
| Exact Mass | 142.026611 |
| PSA | 52.60000 |
| LogP | 1.50 |
| Vapor Pressure | 0.3±0.4 mmHg at 25°C |
| Refractive Index | 1.446 |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- 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 Dimethyl acetylenedicarboxylate?
The CAS number of Dimethyl acetylenedicarboxylate is 762-42-5.
What are the molecular formula and molecular weight of Dimethyl acetylenedicarboxylate?
Dimethyl acetylenedicarboxylate has molecular formula C6H6O4 and molecular weight 142.109 g/mol.
Is Dimethyl acetylenedicarboxylate hazardous?
Dimethyl acetylenedicarboxylate has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H314 — Causes severe skin burns and eye damage.
What are the upstream and downstream products of Dimethyl acetylenedicarboxylate?
For Dimethyl acetylenedicarboxylate, Upstream Products: Methanol, Methyl 5-oxo-2,5-dihydro-1H-pyrazole-3-carboxylate, Acetylenedicarboxylic acid; Downstream Products: Cellocidin, dimethyl 1H-indole-2,3-dicarboxylate, 5-Methyl-2-phenylindolizine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Dimethyl acetylenedicarboxylate (CAS 762-42-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-3391-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.