Methyl tetrahydrophthalic anhydride
Also known as: 6-methyl-3a,4,5,7a-tetrahydro-2-benzofuran-1,3-dione, 5-methyl-7,7a-dihydroisobenzofuran-1,3(3aH,6H)-dione, 3a,4,5,7a-tetrahydro-6-methyl-1,3-isobenzofurandione, MTHPA, Methyltetrahydrophthalic anhydride (mixture of isomers)
Methyl tetrahydrophthalic anhydride (CAS 19438-64-3) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C9H10O3 and a molecular weight of 166.174 g/mol. Key properties include a boiling point of 303.0±41.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 142.9±24.8 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 19438-64-3
- Jingsj CID
- J-44970-7
- Molecular Formula
- C9H10O3
- Molecular Weight
- 166.174 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 303.0±41.0 °C at 760 mmHg |
|---|---|
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 142.9±24.8 °C |
| Exact Mass | 166.062988 |
| PSA | 43.37000 |
| LogP | 0.57 |
| Vapor Pressure | 0.0±0.6 mmHg at 25°C |
| Refractive Index | 1.508 |
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 Methyl tetrahydrophthalic anhydride?
The CAS number of Methyl tetrahydrophthalic anhydride is 19438-64-3.
What are the molecular formula and molecular weight of Methyl tetrahydrophthalic anhydride?
Methyl tetrahydrophthalic anhydride has molecular formula C9H10O3 and molecular weight 166.174 g/mol.
What are the upstream and downstream products of Methyl tetrahydrophthalic anhydride?
For Methyl tetrahydrophthalic anhydride, Upstream Products: 1,2,3,6-Tetrahydro-4-methylphthalic anhydride.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Methyl tetrahydrophthalic anhydride (CAS 19438-64-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-44970-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.