4-Phenylpyridine N-oxide
Also known as: 4-Phenylpyridine 1-oxide, 1-oxido-4-phenylpyridin-1-ium, 1-Oxylato-4-phenylpyridinium, 4-Phenyl-pyridine1-oxide, Pyridine, 4-phenyl-, 1-oxide, NSC 187559
4-Phenylpyridine N-oxide (CAS 1131-61-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C11H9NO and a molecular weight of 171.195 g/mol. Key properties include a melting point of 153-155 °C(lit.), a boiling point of 410.9±24.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 202.3±22.9 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 1131-61-9
- Jingsj CID
- J-21979-4
- Molecular Formula
- C11H9NO
- Molecular Weight
- 171.195 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 153-155 °C(lit.) |
|---|---|
| Boiling Point | 410.9±24.0 °C at 760 mmHg |
| Density | 1.1±0.1 g/cm3 |
| Flash Point | 202.3±22.9 °C |
| Exact Mass | 171.068420 |
| PSA | 25.46000 |
| LogP | 0.93 |
| Vapor Pressure | 0.0±0.9 mmHg at 25°C |
| Refractive Index | 1.573 |
Customs & Trade Information
| HS Code | 2933399090 |
|---|---|
| Summary | 2933399090. other compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure. 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-Phenylpyridine N-oxide?
The CAS number of 4-Phenylpyridine N-oxide is 1131-61-9.
What are the molecular formula and molecular weight of 4-Phenylpyridine N-oxide?
4-Phenylpyridine N-oxide has molecular formula C11H9NO and molecular weight 171.195 g/mol.
What are the upstream and downstream products of 4-Phenylpyridine N-oxide?
For 4-Phenylpyridine N-oxide, Upstream Products: 4-Phenylpyridine, 4-Chloropyridine N-oxide, Phenylboronic acid; Downstream Products: 4-Phenylpyridin-2-amine, Methyltrioxorhenium(VII), 4-Phenylpyridin-2-ol.
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-Phenylpyridine N-oxide (CAS 1131-61-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-21979-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.