Pyridine N-oxide
Also known as: Pyridine 1-oxide, Pyridine oxide, 1-Oxidepyridine, Pyridin-N-oxid, Pyridine-N-oxide
Pyridine N-oxide (CAS 694-59-7) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H5NO and a molecular weight of 95.099 g/mol. Key properties include a melting point of 62-67 °C(lit.), a boiling point of 270.0±9.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 117.1±18.7 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 694-59-7
- Jingsj CID
- J-35800-9
- Molecular Formula
- C5H5NO
- Molecular Weight
- 95.099 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 62-67 °C(lit.) |
|---|---|
| Boiling Point | 270.0±9.0 °C at 760 mmHg |
| Density | 1.0±0.1 g/cm3 |
| Flash Point | 117.1±18.7 °C |
| Exact Mass | 95.037117 |
| PSA | 25.46000 |
| LogP | -1.20 |
| Vapor Pressure | 0.0±0.5 mmHg at 25°C |
| Refractive Index | 1.517 |
| Additional Property | soluble |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 29333999 |
|---|
Frequently Asked Questions
What is the CAS number of Pyridine N-oxide?
The CAS number of Pyridine N-oxide is 694-59-7.
What are the molecular formula and molecular weight of Pyridine N-oxide?
Pyridine N-oxide has molecular formula C5H5NO and molecular weight 95.099 g/mol.
Is Pyridine N-oxide hazardous?
Pyridine N-oxide has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of Pyridine N-oxide?
For Pyridine N-oxide, Upstream Products: Pyridine, 2-Picolinic acid, 4-Chloropyridine N-oxide; Downstream Products: 4-(pyridin-2-yl)benzonitrile, 4-Ethoxypyridine, Pyridinium acetate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Pyridine N-oxide (CAS 694-59-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-35800-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.