1,2,3,6-Tetrahydro-4-methylphthalic anhydride
Also known as: 4-Methyltetrahydrophthalic anhydride, 4-Methyl-4-cyclohexene-1,2-dicarboxylic anhydride, cis-4-Methyl-1,2,3,6-tetrahydrophthalic anhydride, 5-Methyl-3a,4,7,7a-tetrahydroisobenzofuran-1,3-dione, 3a,4,7,7a-Tetrahydro-5-methyl-1,3-isobenzofurandione, 4-Methyl-Δ4-tetrahydrophthalic anhydride, Methyltetrahydrophthalic anhydride, MTHPA, NSC 52669
1,2,3,6-Tetrahydro-4-methylphthalic anhydride (CAS 3425-89-6) 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 melting point of 59-60°C, 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.
- 3425-89-6
- Jingsj CID
- J-49118-9
- 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
| Melting Point | 59-60°C |
|---|---|
| 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 1,2,3,6-Tetrahydro-4-methylphthalic anhydride?
The CAS number of 1,2,3,6-Tetrahydro-4-methylphthalic anhydride is 3425-89-6.
What are the molecular formula and molecular weight of 1,2,3,6-Tetrahydro-4-methylphthalic anhydride?
1,2,3,6-Tetrahydro-4-methylphthalic anhydride has molecular formula C9H10O3 and molecular weight 166.174 g/mol.
What are the upstream and downstream products of 1,2,3,6-Tetrahydro-4-methylphthalic anhydride?
For 1,2,3,6-Tetrahydro-4-methylphthalic anhydride, Upstream Products: Maleic anhydride, isoprene; Downstream Products: 4-Methylphthalic acid, 4-Methylbenzoic acid, 5-Methyl-2-benzofuran-1,3-dione.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "1,2,3,6-Tetrahydro-4-methylphthalic anhydride (CAS 3425-89-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-49118-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.