4-Chlorophthalazin-1(2H)-one

4-氯-1(2H)-酞嗪酮

Also known as: 4-chloro-1,2-dihydrophthalazin-1-one, 1-chloro-4-phthalazinone, 1-chlorophthalazin-4-one, 1-chlorophtalazin-4-one, 4-chlor-2H-phthalazin-1-on, 4-chlorophthalazin-1(2H)-one, 4-chloro-1,2-dihydrophthalazinone, 4-chloro-1-phthalazinol, 4-chloro-2H-phthalazin-1-one, 4-chlorophthalazin-1-ol, AURORA KA-6768

4-Chlorophthalazin-1(2H)-one (CAS 2257-69-4) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C8H5ClN2O and a molecular weight of 180.59100 g/mol. It is also known as 4-chloro-1,2-dihydrophthalazin-1-one, 1-chloro-4-phthalazinone and 1-chlorophthalazin-4-one. Key properties include a melting point of 265ºC, a boiling point of 452.7ºC at 760mmHg, a density of 1.5g/cm3 and a flash point of 227.6ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

2257-69-4

Jingsj CID

J-45132-5

Molecular Formula

C₈H₅ClN₂O

Chinese Name

4-氯-1(2H)-酞嗪酮

Molecular Weight

180.59100 g/mol

Category

Ketones

Last updated

8/21/2026