4-Nitroquinoline 1-oxide
Also known as: 4-Nitroquinoline N-oxide, 4-Nitroquinoline oxide, 4-NQO, Nitrochin, 4-nitro-1-oxidoquinolin-1-ium, 4-nitro-quinolin 1-oxide, 4-nitrochinolinn-oxid, Quinoline, 4-nitro-, 1-oxide
4-Nitroquinoline 1-oxide (CAS 56-57-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H6N2O3 and a molecular weight of 190.16 g/mol. Key properties include a melting point of 154-156 °C(lit.), a boiling point of 387.6±34.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 188.2±25.7 °C. It is classified under GHS with signal word Danger and hazard statements H350 — May cause cancer. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 56-57-5
- Jingsj CID
- J-34531-3
- Molecular Formula
- C9H6N2O3
- Molecular Weight
- 190.16 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 154-156 °C(lit.) |
|---|---|
| Boiling Point | 387.6±34.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 188.2±25.7 °C |
| Exact Mass | 190.037842 |
| PSA | 71.28000 |
| LogP | 0.92 |
| Vapor Pressure | 0.0±0.9 mmHg at 25°C |
| Refractive Index | 1.659 |
| Stability | Stable. Hygroscopic, light-sensitive. Incompatible with strong oxidizing agents. |
| Additional Property | acetone: clear to hazy |
GHS Safety & Compliance
- H350 — May cause cancer
Activity & Biological Data
| Additional Information | [1]. Mukherjee A, et al. Carcinogen 4-Nitroquinoline Oxide (4-NQO) Induces Oncostatin-M (OSM) in Esophageal Cells. In Vivo. 2023 Mar-Apr;37(2):506-518. [2]. Han H, et al. 4-NQO induces apoptosis via p53-dependent mitochondrial signaling pathway. Toxicology. 2007 Feb 12;230(2-3):151-63. |
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Frequently Asked Questions
What is the CAS number of 4-Nitroquinoline 1-oxide?
The CAS number of 4-Nitroquinoline 1-oxide is 56-57-5.
What are the molecular formula and molecular weight of 4-Nitroquinoline 1-oxide?
4-Nitroquinoline 1-oxide has molecular formula C9H6N2O3 and molecular weight 190.16 g/mol.
Is 4-Nitroquinoline 1-oxide hazardous?
4-Nitroquinoline 1-oxide has GHS signal word Danger and hazard statements H350 — May cause cancer.
What are the upstream and downstream products of 4-Nitroquinoline 1-oxide?
For 4-Nitroquinoline 1-oxide, Upstream Products: Quinoline 1-oxide, 4-Nitroquinoline; Downstream Products: 4-Chloro-3-nitroquinoline, 4-Methoxyquinoline, 4-chloroquinoline-2-carbonitrile.
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-Nitroquinoline 1-oxide (CAS 56-57-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-34531-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.