4-Hydroxyisoquinolin-1(2H)-one

Also known as: 1,4-Dihydroxyisoquinoline, 1,4-Isoquinolinediol, 4-Hydroxyisocarbostyril, 4-hydroxy-1,2-dihydroisoquinolin-1-one, 4-hydroxy-2H-isoquinolin-1-one, 4-hydroxyisoquinolin-1(2H)-one, NSC 28792, NSC 67757, isoquinoline-1,4-diol

4-Hydroxyisoquinolin-1(2H)-one (CAS 30081-72-2) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H7NO2 and a molecular weight of 161.15700 g/mol. Key properties include a boiling point of 440.1ºC at 760mmHg, a density of 1.376g/cm3 and a flash point of 220ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 30081-72-2
Jingsj CID: J-1143576-0
Molecular Formula: C₉H₇NO₂
Molecular Weight: 161.15700 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	440.1ºC at 760mmHg
Density	1.376g/cm3
Flash Point	220ºC
Exact Mass	161.04800
PSA	53.09000
LogP	1.23370
Refractive Index	1.657

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 4-Hydroxyisoquinolin-1(2H)-one?

The CAS number of 4-Hydroxyisoquinolin-1(2H)-one is 30081-72-2.

What are the molecular formula and molecular weight of 4-Hydroxyisoquinolin-1(2H)-one?

4-Hydroxyisoquinolin-1(2H)-one has molecular formula C9H7NO2 and molecular weight 161.15700 g/mol.

What are the upstream and downstream products of 4-Hydroxyisoquinolin-1(2H)-one?

For 4-Hydroxyisoquinolin-1(2H)-one, Downstream Products: 1,4-Dichloroisoquinoline.

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. "4-Hydroxyisoquinolin-1(2H)-one (CAS 30081-72-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1143576-0 (accessed 2026-11-09).

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