4-Chloro-1(2H)-isoquinolone
Also known as: 4-Chloroisocarbostyril, 4-Chloroisoquinolin-1(2H)-one, 4-Chloro-2H-isoquinolin-1-one, 4-Chloro-1-hydroxyisoquinoline, 4-Chloro-1,2-dihydroisoquinolin-1-one, 4-Chloro-1-(2H)isoquinoline, 4-Chloro-1(2H)-isoquinolinone, 4-chloro-1-isoquinolinol, 1(2H)-Isoquinolinone, 4-chloro-
4-Chloro-1(2H)-isoquinolone (CAS 56241-09-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H6ClNO and a molecular weight of 179.603 g/mol. Key properties include a melting point of 235-237ºC (DEC), a boiling point of 394.2±42.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 192.2±27.9 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 56241-09-9
- Jingsj CID
- J-1525683-4
- Molecular Formula
- C9H6ClNO
- Molecular Weight
- 179.603 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 235-237ºC (DEC) |
|---|---|
| Boiling Point | 394.2±42.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 192.2±27.9 °C |
| Exact Mass | 179.013794 |
| PSA | 32.86000 |
| LogP | 1.33 |
| Vapor Pressure | 0.0±0.9 mmHg at 25°C |
| Refractive Index | 1.642 |
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 4-Chloro-1(2H)-isoquinolone?
The CAS number of 4-Chloro-1(2H)-isoquinolone is 56241-09-9.
What are the molecular formula and molecular weight of 4-Chloro-1(2H)-isoquinolone?
4-Chloro-1(2H)-isoquinolone has molecular formula C9H6ClNO and molecular weight 179.603 g/mol.
What are the upstream and downstream products of 4-Chloro-1(2H)-isoquinolone?
For 4-Chloro-1(2H)-isoquinolone, Downstream Products: 1,4-Dichloroisoquinoline, 1,4-Dichloroisoquinoline-7-sulfonyl chloride.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4-Chloro-1(2H)-isoquinolone (CAS 56241-09-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1525683-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.