1-[(5,7-dichloro-1,9-dihydro-2-methyl-9-oxopyrazolo[5,1-b]quinazolin-3-yl)azo]anthraquinone

颜料红251

Also known as: Pigment Red 251, Paliotol Red L 3550HD, C.I. Pigment Red 251, EINECS 277-824-4, 1-[(2E)-2-(5,7-dichloro-2-methyl-9-oxopyrazolo[5,1-b]quinazolin-3-ylidene)hydrazinyl]anthracene-9,10-dione, 1-[2-(5,7-dichloro-1,9-dihydro-2-methyl-9-oxopyrazolo[5,1-b]quinazolin-3-yl)diazenyl]-9,10-anthracenedione, 3-(1-Anthraquinonylazo)-5,7-dichloro-2-methyl-1H-pyrazolo[5,1-b]quinazolin-9-one, 3-[(9,10-Dihydro-9,10-dioxoanthracen-1-yl)azo]-5,7-dichloro-2-methyl-1H-pyrazolo[5,1-b]quinazolin-9-one

1-[(5,7-dichloro-1,9-dihydro-2-methyl-9-oxopyrazolo[5,1-b]quinazolin-3-yl)azo]anthraquinone (CAS 74336-60-0) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C25H13Cl2N5O3 and a molecular weight of 502.30800 g/mol. It is also known as Pigment Red 251, Paliotol Red L 3550HD and C.I. Pigment Red 251. Key properties include a boiling point of 716.011ºC at 760 mmHg, a density of 1.66g/cm3 and a flash point of 386.829ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

74336-60-0

Jingsj CID

J-976897-6

Molecular Formula

C₂₅H₁₃Cl₂N₅O₃

Chinese Name

颜料红251

Molecular Weight

502.30800 g/mol

Category

Organic Compounds

Last updated

8/21/2026