(2-Oxo-2,3-dihydro-1H-indol-3-yl)acetic acid

(2-氧代-2,3-二氢-1H-吲哚-3-基)乙酸

Also known as: 2-Oxindole-3-acetic acid, Oxindole-3-acetic acid, 2-(2-oxoindolin-3-yl)acetic acid, 2-(2-oxo-1,3-dihydroindol-3-yl)acetic acid, 2-(2-ketoindolin-3-yl)acetic acid, 2-(2-hydroxy-3H-indol-3-yl)acetic acid

(2-Oxo-2,3-dihydro-1H-indol-3-yl)acetic acid (CAS 2971-31-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C10H9NO3 and a molecular weight of 191.183 g/mol. It is also known as 2-Oxindole-3-acetic acid, Oxindole-3-acetic acid and 2-(2-oxoindolin-3-yl)acetic acid. Key properties include a boiling point of 445.2±38.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 223.0±26.8 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 2971-31-5
Jingsj CID: J-1499672-8
Molecular Formula: C₁₀H₉NO₃
Chinese Name: (2-氧代-2,3-二氢-1H-吲哚-3-基)乙酸
Molecular Weight: 191.183 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	445.2±38.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	223.0±26.8 °C

Frequently Asked Questions

What is the CAS number of (2-Oxo-2,3-dihydro-1H-indol-3-yl)acetic acid?

The CAS number of (2-Oxo-2,3-dihydro-1H-indol-3-yl)acetic acid is 2971-31-5.

What are the molecular formula and molecular weight of (2-Oxo-2,3-dihydro-1H-indol-3-yl)acetic acid?

(2-Oxo-2,3-dihydro-1H-indol-3-yl)acetic acid has molecular formula C10H9NO3 and molecular weight 191.183 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. "(2-Oxo-2,3-dihydro-1H-indol-3-yl)acetic acid (CAS 2971-31-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1499672-8 (accessed 2026-10-22).

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