1-oxo-1,3-dihydroisobenzofuran-5-carboxylic acid
Also known as: 5-Carboxyphthalide, 1,3-Dihydro-1-oxoisobenzofuran-5-carboxylic acid, 1-oxo-3H-2-benzofuran-5-carboxylic acid, phthalide-5-carboxylic acid, 1-Oxo-phthalan-5-carboxylic acid
1-oxo-1,3-dihydroisobenzofuran-5-carboxylic acid (CAS 4792-29-4) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C9H6O4 and a molecular weight of 178.14200 g/mol. Key properties include a boiling point of 481.1ºC at 760 mmHg, a density of 1.502 and a flash point of 206.3ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 4792-29-4
- Jingsj CID
- J-1523565-1
- Molecular Formula
- C9H6O4
- Molecular Weight
- 178.14200 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 481.1ºC at 760 mmHg |
|---|---|
| Density | 1.502 |
| Flash Point | 206.3ºC |
| Exact Mass | 178.02700 |
| PSA | 63.60000 |
| LogP | 1.05520 |
| Refractive Index | 1.635 |
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-oxo-1,3-dihydroisobenzofuran-5-carboxylic acid?
The CAS number of 1-oxo-1,3-dihydroisobenzofuran-5-carboxylic acid is 4792-29-4.
What are the molecular formula and molecular weight of 1-oxo-1,3-dihydroisobenzofuran-5-carboxylic acid?
1-oxo-1,3-dihydroisobenzofuran-5-carboxylic acid has molecular formula C9H6O4 and molecular weight 178.14200 g/mol.
What are the upstream and downstream products of 1-oxo-1,3-dihydroisobenzofuran-5-carboxylic acid?
For 1-oxo-1,3-dihydroisobenzofuran-5-carboxylic acid, Upstream Products: Terephthalic acid, Formaldehyde, 1,3,5-trioxane; Downstream Products: 1-Oxo-1,3-dihydroisobenzofuran-5-carbonyl chloride, 5-Cyanophthalide, 1-Oxo-1,3-dihydroisobenzofuran-5-carbaldehyde.
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-oxo-1,3-dihydroisobenzofuran-5-carboxylic acid (CAS 4792-29-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1523565-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.