Isoquinolin-1(2H)-one
Also known as: Isocarbostyril, 1-Hydroxyisoquinoline, 1-Isoquinolinol, Isoquinolin-1-ol, Isoquinolin-1-one, 1(2H)-Isoquinolinone, 1,2-Dihydroisoquinolin-1-one, 2H-Isoquinolin-1-one, 1-Oxo-1,2-dihydroisoquinoline, NSC 272731, (2H)-Isoquinolone, 2(1H)-Isoquinolinone
Isoquinolin-1(2H)-one (CAS 491-30-5) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C9H7NO and a molecular weight of 145.16 g/mol. Key properties include a melting point of 212-216 °C, a boiling point of 406.3±18.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 199.5±21.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 491-30-5
- Jingsj CID
- J-1961417-6
- Molecular Formula
- C9H7NO
- Molecular Weight
- 145.16 g/mol
- Category
- Ketones
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 212-216 °C |
|---|---|
| Boiling Point | 406.3±18.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 199.5±21.2 °C |
| Exact Mass | 145.052765 |
| PSA | 33.12000 |
| LogP | 0.59 |
| Vapor Pressure | 0.0±1.0 mmHg at 25°C |
| Refractive Index | 1.691 |
Customs & Trade Information
| HS Code | 2933499090 |
|---|---|
| Summary | 2933499090. other compounds containing in the structure a quinoline or isoquinoline ring-system (whether or not hydrogenated), not further fused. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of Isoquinolin-1(2H)-one?
The CAS number of Isoquinolin-1(2H)-one is 491-30-5.
What are the molecular formula and molecular weight of Isoquinolin-1(2H)-one?
Isoquinolin-1(2H)-one has molecular formula C9H7NO and molecular weight 145.16 g/mol.
What are the upstream and downstream products of Isoquinolin-1(2H)-one?
For Isoquinolin-1(2H)-one, Upstream Products: 1-Chloroisoquinoline, 2-Bromobenzamide, 2-Iodobenzonitrile; Downstream Products: 4-Bromoisoquinolin-1(2H)-one, 1,4-Dibromoisoquinoline, 3,4-Dihydroisoquinolin-1(2H)-one.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Isoquinolin-1(2H)-one (CAS 491-30-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1961417-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.