Isoquinoline-1,3(2H,4H)-dione
Also known as: 1,3(2H,4H)-Isoquinolinedione, 1,3-[2H,4H]-Isoquinolinedione, 1,2,3,4-Tetrahydroisoquinoline-1,3-dione, Homophthalimide, 2,4-dihydroisoquinoline-1,3-dione, 4H-isoquinoline-1,3-dione, NSC 409146
Isoquinoline-1,3(2H,4H)-dione (CAS 4456-77-3) 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 161.157 g/mol. Key properties include a boiling point of 377.1±35.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 183.9±26.1 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 4456-77-3
- Jingsj CID
- J-1443146-0
- Molecular Formula
- C9H7NO2
- Molecular Weight
- 161.157 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 377.1±35.0 °C at 760 mmHg |
|---|---|
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 183.9±26.1 °C |
| Exact Mass | 161.047684 |
| PSA | 46.17000 |
| LogP | 0.08 |
| Vapor Pressure | 0.0±0.9 mmHg at 25°C |
| Refractive Index | 1.586 |
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 Isoquinoline-1,3(2H,4H)-dione?
The CAS number of Isoquinoline-1,3(2H,4H)-dione is 4456-77-3.
What are the molecular formula and molecular weight of Isoquinoline-1,3(2H,4H)-dione?
Isoquinoline-1,3(2H,4H)-dione has molecular formula C9H7NO2 and molecular weight 161.157 g/mol.
What are the upstream and downstream products of Isoquinoline-1,3(2H,4H)-dione?
For Isoquinoline-1,3(2H,4H)-dione, Upstream Products: Homophthalic acid, 1,2-Dichlorobenzene, Homophthalic anhydride; Downstream Products: 1,2,3,4-Tetrahydroisoquinoline, Isoquinoline, 3-Chloroisoquinolin-5-amine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Isoquinoline-1,3(2H,4H)-dione (CAS 4456-77-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1443146-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.