4(3H)-Quinazolinone
Also known as: 4-Hydroxyquinazoline, 3H-quinazolin-4-one, 4(1H)-Quinazolinone, 4(3H)-Quinazolone, 4-Quinazolinone, 4-Quinazolinol, 4-Oxoquinazoline, Quinazolin-4-ol, Quinazolin-4-one, Quinazolone, 3,4-dihydroquinazolin-4-one, 3,4-Dihydro-4-oxoquinazoline, 4-HQN, quinazolidin-4-one
4(3H)-Quinazolinone (CAS 491-36-1) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C8H6N2O and a molecular weight of 146.146 g/mol. Key properties include a melting point of 216-219 °C(lit.), a boiling point of 324.8±15.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 150.2±20.4 °C. It is listed by 1 supplier; request a quote for pricing. Record last updated Aug 21, 2026.
- CAS No.
- 491-36-1
- Jingsj CID
- J-3709-2
- Molecular Formula
- C8H6N2O
- Molecular Weight
- 146.146 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
Made to Order | - | - | CN China |
Physicochemical Properties
| Melting Point | 216-219 °C(lit.) |
|---|---|
| Boiling Point | 324.8±15.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 150.2±20.4 °C |
| Exact Mass | 146.048019 |
| PSA | 45.75000 |
| LogP | 0.30 |
| Vapor Pressure | 0.0±0.7 mmHg at 25°C |
| Refractive Index | 1.705 |
Activity & Biological Data
| Additional Information | [1]. Jafari E, et al. Quinazolinone and quinazoline derivatives: recent structures with potent antimicrobial and cytotoxic activities. Res Pharm Sci. 2016 Jan-Feb;11(1):1-14. [2]. Hameed A, et al. Quinazoline and quinazolinone as important medicinal scaffolds: a comparative patent review (2011-2016). Expert Opin Ther Pat. 2018 Apr;28(4):281-297. |
|---|
Customs & Trade Information
| HS Code | 2933990090 |
|---|---|
| Summary | 2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. 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(3H)-Quinazolinone?
The CAS number of 4(3H)-Quinazolinone is 491-36-1.
What are the molecular formula and molecular weight of 4(3H)-Quinazolinone?
4(3H)-Quinazolinone has molecular formula C8H6N2O and molecular weight 146.146 g/mol.
Which suppliers offer 4(3H)-Quinazolinone?
1 supplier(s) listed; request a quote for pricing.
What are the upstream and downstream products of 4(3H)-Quinazolinone?
For 4(3H)-Quinazolinone, Upstream Products: Formaldehyde, Methyl anthranilate, Trimethyl orthoformate.
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(3H)-Quinazolinone (CAS 491-36-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-3709-2 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.