4-Chloropyridine N-oxide
Also known as: 4-Chloropyridine 1-oxide, 4-Chloropyridine oxide, 4-Chloro-pyridine1-oxide, 4-Chloropyridine, N-oxide, 4-Chloropyridine-N-oxide, Pyridine, 4-chloro-, 1-oxide, EINECS 214-336-2, MFCD00047425, TH 285N, AURORA KA-3011
4-Chloropyridine N-oxide (CAS 1121-76-2) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H4ClNO and a molecular weight of 129.544 g/mol. Key properties include a melting point of 160 °C (dec.)(lit.), a boiling point of 310.0±15.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 141.3±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.
- 1121-76-2
- Jingsj CID
- J-1059959-4
- Molecular Formula
- C5H4ClNO
- Molecular Weight
- 129.544 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 160 °C (dec.)(lit.) |
|---|---|
| Boiling Point | 310.0±15.0 °C at 760 mmHg |
| Density | 1.3±0.1 g/cm3 |
| Flash Point | 141.3±20.4 °C |
| Exact Mass | 128.998138 |
| PSA | 25.46000 |
| LogP | -0.44 |
| Vapor Pressure | 0.0±0.6 mmHg at 25°C |
| Refractive Index | 1.552 |
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 4-Chloropyridine N-oxide?
The CAS number of 4-Chloropyridine N-oxide is 1121-76-2.
What are the molecular formula and molecular weight of 4-Chloropyridine N-oxide?
4-Chloropyridine N-oxide has molecular formula C5H4ClNO and molecular weight 129.544 g/mol.
Is 4-Chloropyridine N-oxide hazardous?
4-Chloropyridine 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 4-Chloropyridine N-oxide?
For 4-Chloropyridine N-oxide, Upstream Products: 4-chloropyridine, 4-Nitropyridine N-oxide, Pyridine N-oxide; Downstream Products: 4-Chloro-2-phenylpyridine, 4-Ethoxypyridine N-oxide, Pyridine N-oxide.
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-Chloropyridine N-oxide (CAS 1121-76-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1059959-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.