2-Pyridinol-1-oxide
Also known as: 2-Pyridinol N-oxide, 1-Hydroxy-2-pyridone, 2-Hydroxypyridine 1-oxide, 2-Hydroxypyridine N-oxide, Pyridin-2-ol 1-oxide, 1-Hydroxypyridin-2-one, HPNO, HOPO
2-Pyridinol-1-oxide (CAS 13161-30-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H5NO2 and a molecular weight of 111.099 g/mol. Key properties include a melting point of 149-152 °C(lit.), a boiling point of 387.7±15.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 188.3±20.4 °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.
- 13161-30-3
- Jingsj CID
- J-11542-3
- Molecular Formula
- C5H5NO2
- Molecular Weight
- 111.099 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 149-152 °C(lit.) |
|---|---|
| Boiling Point | 387.7±15.0 °C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Flash Point | 188.3±20.4 °C |
| Exact Mass | 111.032028 |
| PSA | 45.69000 |
| LogP | -1.94 |
| Vapor Pressure | 0.0±0.9 mmHg at 25°C |
| Refractive Index | 1.554 |
| Storage Conditions | Store at RT. |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
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 2-Pyridinol-1-oxide?
The CAS number of 2-Pyridinol-1-oxide is 13161-30-3.
What are the molecular formula and molecular weight of 2-Pyridinol-1-oxide?
2-Pyridinol-1-oxide has molecular formula C5H5NO2 and molecular weight 111.099 g/mol.
Is 2-Pyridinol-1-oxide hazardous?
2-Pyridinol-1-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 2-Pyridinol-1-oxide?
For 2-Pyridinol-1-oxide, Upstream Products: 2(1H)-Pyridone, 2,3-DIMETHYL-1,3-BUTADIENE, 2-Chloropyridine; Downstream Products: 5-Amino-2-pyridinol 1-oxide, 5-nitro-2-pyridinol N-oxide, 2(1H)-Pyridone.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2-Pyridinol-1-oxide (CAS 13161-30-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-11542-3 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.