4,5-Dichloro-6-hydroxy-2-phenylpyridazin-3(2H)-one

4,5-二氯-6-羟基-2-苯基-3(2H)哒嗪酮

Also known as: 3,6-Pyridazinedione, 4,5-dichloro-1,2-dihydro-1-phenyl-, 4,5-Dichlor-3-hydroxy-1-phenyl-pyridazon-6, 4,5-Dichloro-1-phenyl-1,2-dihydropyridazine-3,6-dione, 4,5-Dichloro-6-hydroxy-2-phenyl-2H-pyridazin-3-one, 2-phenyl-3-oxo-4,5-dichloro-6-hydroxy-2H-pyridazine, 4,5-dichloro-2-phenyl-1H-pyridazine-3,6-dione

4,5-Dichloro-6-hydroxy-2-phenylpyridazin-3(2H)-one (CAS 1698-64-2) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C10H6Cl2N2O2 and a molecular weight of 257.07300 g/mol. It is also known as 3,6-Pyridazinedione, 4,5-dichloro-1,2-dihydro-1-phenyl-, 4,5-Dichlor-3-hydroxy-1-phenyl-pyridazon-6 and 4,5-Dichloro-1-phenyl-1,2-dihydropyridazine-3,6-dione. Key properties include a boiling point of 361.6ºC at 760 mmHg, a density of 1.59g/cm3 and a flash point of 172.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
1698-64-2
Jingsj CID
J-1145602-9
Molecular Formula
C10H6Cl2N2O2
Chinese Name
4,5-二氯-6-羟基-2-苯基-3(2H)哒嗪酮
Molecular Weight
257.07300 g/mol
Category
Ketones
Last updated
8/21/2026

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Physicochemical Properties

Boiling Point361.6ºC at 760 mmHg
Density1.59g/cm3
Flash Point172.5ºC

Frequently Asked Questions

What is the CAS number of 4,5-Dichloro-6-hydroxy-2-phenylpyridazin-3(2H)-one?

The CAS number of 4,5-Dichloro-6-hydroxy-2-phenylpyridazin-3(2H)-one is 1698-64-2.

What are the molecular formula and molecular weight of 4,5-Dichloro-6-hydroxy-2-phenylpyridazin-3(2H)-one?

4,5-Dichloro-6-hydroxy-2-phenylpyridazin-3(2H)-one has molecular formula C10H6Cl2N2O2 and molecular weight 257.07300 g/mol.

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

Last updated:

How to cite: Jingsj. "4,5-Dichloro-6-hydroxy-2-phenylpyridazin-3(2H)-one (CAS 1698-64-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1145602-9 (accessed 2026-10-24).

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