2,3-Dimethylmaleic anhydride
Also known as: 3,4-Dimethyl-2,5-furandione, 3,4-dimethylfuran-2,5-dione, Dimethylmaleic anhydride, Pyrocinchonic anhydride, 3,4-Dimethylmaleic anhydride
2,3-Dimethylmaleic anhydride (CAS 766-39-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H6O3 and a molecular weight of 126.110 g/mol. Key properties include a melting point of 93-96 °C(lit.), a boiling point of 223.0±0.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 95.6±15.9 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 766-39-2
- Jingsj CID
- J-49058-4
- Molecular Formula
- C6H6O3
- Molecular Weight
- 126.110 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 93-96 °C(lit.) |
|---|---|
| Boiling Point | 223.0±0.0 °C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 95.6±15.9 °C |
| Exact Mass | 126.031693 |
| PSA | 43.37000 |
| LogP | 0.82 |
| Vapor Pressure | 0.1±0.4 mmHg at 25°C |
| Refractive Index | 1.487 |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H319 — Causes serious eye irritation
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 2,3-Dimethylmaleic anhydride?
The CAS number of 2,3-Dimethylmaleic anhydride is 766-39-2.
What are the molecular formula and molecular weight of 2,3-Dimethylmaleic anhydride?
2,3-Dimethylmaleic anhydride has molecular formula C6H6O3 and molecular weight 126.110 g/mol.
Is 2,3-Dimethylmaleic anhydride hazardous?
2,3-Dimethylmaleic anhydride has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H319 — Causes serious eye irritation.
What are the upstream and downstream products of 2,3-Dimethylmaleic anhydride?
For 2,3-Dimethylmaleic anhydride, Upstream Products: Maleic anhydride, 2-Anilinopyridine, Maleic acid; Downstream Products: Dimethyl 3,4-furandicarboxylate, Succinimide, 3,6-Dichloro-4,5-dimethylpyridazine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2,3-Dimethylmaleic anhydride (CAS 766-39-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-49058-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.