4,5-Dichloropyridin-2(1H)-one
Also known as: 4,5-Dichloro-2(1H)-pyridinone, 4,5-Dichloropyridin-2-ol, 4,5-Dichloro-2-hydroxypyridine, 2-Hydroxy-4,5-dichloropyridine, 4,5-Dichloropyridin-2(1H)-one, 2(1H)-Pyridinone, 4,5-dichloro-
4,5-Dichloropyridin-2(1H)-one (CAS 856965-66-7) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H3Cl2NO and a molecular weight of 163.989 g/mol. Key properties include a boiling point of 244.0±40.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 101.4±27.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 856965-66-7
- Jingsj CID
- J-1443310-4
- Molecular Formula
- C5H3Cl2NO
- Molecular Weight
- 163.989 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 244.0±40.0 °C at 760 mmHg |
|---|---|
| Density | 1.5±0.1 g/cm3 |
| Flash Point | 101.4±27.3 °C |
| Exact Mass | 162.959167 |
| PSA | 33.12000 |
| LogP | -0.02 |
| Vapor Pressure | 0.0±0.5 mmHg at 25°C |
| Refractive Index | 1.585 |
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 4,5-Dichloropyridin-2(1H)-one?
The CAS number of 4,5-Dichloropyridin-2(1H)-one is 856965-66-7.
What are the molecular formula and molecular weight of 4,5-Dichloropyridin-2(1H)-one?
4,5-Dichloropyridin-2(1H)-one has molecular formula C5H3Cl2NO and molecular weight 163.989 g/mol.
What are the upstream and downstream products of 4,5-Dichloropyridin-2(1H)-one?
For 4,5-Dichloropyridin-2(1H)-one, Upstream Products: 4,5-Dichloro-2-ethoxypyridine, 4-Chloro-2-ethoxypyridine; Downstream Products: 4-Amino-2,5-dichloropyridine, 2,4,5-Trichloropyridine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4,5-Dichloropyridin-2(1H)-one (CAS 856965-66-7)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1443310-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.