3-Methylphthalic anhydride
Also known as: 4-Methylisobenzofuran-1,3-dione, 4-Methyl-2-benzofuran-1,3-dione, 1,3-Isobenzofurandione, 4-methyl-, 2,3-Toluenedicarboxylic anhydride, NSC 61875, Phthalic anhydride, 3-methyl-
3-Methylphthalic anhydride (CAS 4792-30-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C9H6O3 and a molecular weight of 162.142 g/mol. Key properties include a melting point of 114-118 °C, a boiling point of 315.6±21.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 153.3±19.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 4792-30-7
- Jingsj CID
- J-2580-9
- Molecular Formula
- C9H6O3
- Molecular Weight
- 162.142 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 114-118 °C |
|---|---|
| Boiling Point | 315.6±21.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 153.3±19.2 °C |
| Exact Mass | 162.031693 |
| PSA | 43.37000 |
| LogP | 2.06 |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.597 |
Customs & Trade Information
| HS Code | 2932999099 |
|---|---|
| Summary | 2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 3-Methylphthalic anhydride?
The CAS number of 3-Methylphthalic anhydride is 4792-30-7.
What are the molecular formula and molecular weight of 3-Methylphthalic anhydride?
3-Methylphthalic anhydride has molecular formula C9H6O3 and molecular weight 162.142 g/mol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3-Methylphthalic anhydride (CAS 4792-30-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-2580-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.