1-Oxoisoindoline-4-carboxylic acid

1-氧代异吲哚啉-4-羧酸

Also known as: 1-Oxo-4-isoindolinecarboxylic acid, 1-oxo-2,3-dihydroisoindole-4-carboxylic acid, 1H-Isoindole-4-carboxylic acid, 2,3-dihydro-1-oxo-, 1-Oxo-2,3-dihydro-1H-isoindole-4-carboxylic acid, 2,3-dihydro-1-oxo-1H-Isoindole-4-carboxylic acid

1-Oxoisoindoline-4-carboxylic acid (CAS 1261740-37-7) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H7NO3 and a molecular weight of 177.157 g/mol. It is also known as 1-Oxo-4-isoindolinecarboxylic acid, 1-oxo-2,3-dihydroisoindole-4-carboxylic acid and 1H-Isoindole-4-carboxylic acid, 2,3-dihydro-1-oxo-. Key properties include a boiling point of 546.7±50.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 284.5±30.1 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 1261740-37-7
Jingsj CID: J-1357450-5
Molecular Formula: C₉H₇NO₃
Chinese Name: 1-氧代异吲哚啉-4-羧酸
Molecular Weight: 177.157 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	546.7±50.0 °C at 760 mmHg
Density	1.4±0.1 g/cm3
Flash Point	284.5±30.1 °C

Frequently Asked Questions

What is the CAS number of 1-Oxoisoindoline-4-carboxylic acid?

The CAS number of 1-Oxoisoindoline-4-carboxylic acid is 1261740-37-7.

What are the molecular formula and molecular weight of 1-Oxoisoindoline-4-carboxylic acid?

1-Oxoisoindoline-4-carboxylic acid has molecular formula C9H7NO3 and molecular weight 177.157 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "1-Oxoisoindoline-4-carboxylic acid (CAS 1261740-37-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1357450-5 (accessed 2026-10-25).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.