1-Oxo-1,2-dihydro-4-isoquinolinecarboxylic acid

Also known as: 1,2-Dihydro-1-oxoisoquinoline-4-carboxylic acid, 1,2-dihydro-1-oxo-4-isoquinolinecarboxylic acid, 1-Hydroxyisoquinoline-4-carboxylic acid, 1-Oxo-1,2-dihydro-4-isoquinolinecarboxylic acid, 1-Oxo-1,2-dihydroisochinolin-4-carbonsaeure, 1-oxo-1,2-dihydro-4-isoquinolinecarboxylic acid, 1-oxo-2H-isoquinoline-4-carboxylic acid, 4-Isoquinolinecarboxylic acid, 1,2-dihydro-1-oxo-, Isocarbostyril-4-carbonsaeure

1-Oxo-1,2-dihydro-4-isoquinolinecarboxylic acid (CAS 34014-51-2) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C10H7NO3 and a molecular weight of 189.16700 g/mol. Key properties include a melting point of 310ºC, a boiling point of 430.6ºC at 760mmHg, a density of 1.429g/cm3 and a flash point of 214.2ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 34014-51-2
Jingsj CID: J-1318970-3
Molecular Formula: C₁₀H₇NO₃
Molecular Weight: 189.16700 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	310ºC
Boiling Point	430.6ºC at 760mmHg
Density	1.429g/cm3
Flash Point	214.2ºC
Exact Mass	189.04300
PSA	70.16000
LogP	1.22630
Refractive Index	1.638

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-Oxo-1,2-dihydro-4-isoquinolinecarboxylic acid?

The CAS number of 1-Oxo-1,2-dihydro-4-isoquinolinecarboxylic acid is 34014-51-2.

What are the molecular formula and molecular weight of 1-Oxo-1,2-dihydro-4-isoquinolinecarboxylic acid?

1-Oxo-1,2-dihydro-4-isoquinolinecarboxylic acid has molecular formula C10H7NO3 and molecular weight 189.16700 g/mol.

What are the upstream and downstream products of 1-Oxo-1,2-dihydro-4-isoquinolinecarboxylic acid?

For 1-Oxo-1,2-dihydro-4-isoquinolinecarboxylic acid, Upstream Products: 4-Bromoisoquinolin-1(2H)-one, Carbon dioxide, Homophthalic acid; Downstream Products: Methyl 1-oxo-1,2-dihydroisoquinoline-4-carboxylate, Ethyl 1-oxo-1,2-dihydroisoquinoline-4-carboxylate.

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-Oxo-1,2-dihydro-4-isoquinolinecarboxylic acid (CAS 34014-51-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1318970-3 (accessed 2026-11-09).

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