1,3-Dihydro-4-(2-hydroxyethyl)-2H-indole-2-one

Also known as: 4-(2-Hydroxyethyl)oxindole, 4-(2-Hydroxyethyl)indolin-2-one, 4-(2-Hydroxyethyl)-1,3-dihydro-2H-indol-2-one, 4-(2-Hydroxyethyl)oxyindole, Ropinirole Intermediate 5, Ropinirole EP Impurity F, Ropinirole USP RC A, Ropinirol Related Compound A

1,3-Dihydro-4-(2-hydroxyethyl)-2H-indole-2-one (CAS 139122-19-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C10H11NO2 and a molecular weight of 177.200 g/mol. Key properties include a melting point of 148-150ºC, a boiling point of 390.0±42.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 189.7±27.9 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 139122-19-3
Jingsj CID: J-1016653-7
Molecular Formula: C₁₀H₁₁NO₂
Molecular Weight: 177.200 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	148-150ºC
Boiling Point	390.0±42.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	189.7±27.9 °C
Exact Mass	177.078979
PSA	49.33000
LogP	0.29
Vapor Pressure	0.0±0.9 mmHg at 25°C
Refractive Index	1.600
Storage Conditions	Refrigerator

Customs & Trade Information

HS Code	2933790090
Summary	2933790090. other lactams. VAT:17.0%. Tax rebate rate:9.0%. . MFN tariff:9.0%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 1,3-Dihydro-4-(2-hydroxyethyl)-2H-indole-2-one?

The CAS number of 1,3-Dihydro-4-(2-hydroxyethyl)-2H-indole-2-one is 139122-19-3.

What are the molecular formula and molecular weight of 1,3-Dihydro-4-(2-hydroxyethyl)-2H-indole-2-one?

1,3-Dihydro-4-(2-hydroxyethyl)-2H-indole-2-one has molecular formula C10H11NO2 and molecular weight 177.200 g/mol.

What are the upstream and downstream products of 1,3-Dihydro-4-(2-hydroxyethyl)-2H-indole-2-one?

For 1,3-Dihydro-4-(2-hydroxyethyl)-2H-indole-2-one, Upstream Products: 4-[2-(benzoyloxy)ethyl]-3-chloro-1,3-dihydro-2H-indol-2-one, 2-(2-Bromoethyl)benzaldehyde, 4-(2'-Bromoethyl)-3-chloro-1,3-dihydro-2H-indol-2-one; Downstream Products: Ropinirole, 2-(2-Oxoindolin-4-yl)ethyl 4-methylbenzenesulfonate.

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

Last updated: 8/21/2026

How to cite: Jingsj. "1,3-Dihydro-4-(2-hydroxyethyl)-2H-indole-2-one (CAS 139122-19-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1016653-7 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.