5-Chloropyridazin-3(2H)-one

5-氯哒嗪-3(2H)-酮

Also known as: 3(2H)-Pyridazinone, 5-chloro-, 3-Pyridazinol, 5-chloro-, 4-chloro-1H-pyridazin-6-one, 5-CHLOR-3-PYRIDAZINON, 5-CHLOROPYRIDAZIN-3-OL, 5-Chloro-3(2H)-pyridazinone, 5-Chloro-3-pyridazinol, 5-Chloropyridazin-3-(2H)-one

5-Chloropyridazin-3(2H)-one (CAS 660425-07-0) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C4H3ClN2O and a molecular weight of 130.532 g/mol. It is also known as 3(2H)-Pyridazinone, 5-chloro-, 3-Pyridazinol, 5-chloro- and 4-chloro-1H-pyridazin-6-one. Key properties include a boiling point of 342.1±22.0 °C at 760 mmHg, a density of 1.55 and a flash point of 160.7±22.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 660425-07-0
Jingsj CID: J-1429365-0
Molecular Formula: C₄H₃ClN₂O
Chinese Name: 5-氯哒嗪-3(2H)-酮
Molecular Weight: 130.532 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	342.1±22.0 °C at 760 mmHg
Density	1.55
Flash Point	160.7±22.3 °C

Frequently Asked Questions

What is the CAS number of 5-Chloropyridazin-3(2H)-one?

The CAS number of 5-Chloropyridazin-3(2H)-one is 660425-07-0.

What are the molecular formula and molecular weight of 5-Chloropyridazin-3(2H)-one?

5-Chloropyridazin-3(2H)-one has molecular formula C4H3ClN2O and molecular weight 130.532 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "5-Chloropyridazin-3(2H)-one (CAS 660425-07-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1429365-0 (accessed 2026-10-25).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.