2,4-dihydro-4-[(2-methoxyphenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-one

2,4-二氢-4-[(2-甲氧基苯基)偶氮]-5-甲基-2-苯基-3H-吡唑-3-酮

Also known as: Solvent Yellow 72, C.I. 127450, 4-[(2-Methoxyphenyl)azo]-5-methyl-2-phenyl-2H-pyrazol-3(4H)-one, 4-((2-Methoxyphenyl)diazenyl)-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one, 3H-Pyrazol-3-one, 2,4-dihydro-4-[2-(2-methoxyphenyl)diazenyl]-5-methyl-2-phenyl-, 1-Phenyl-3-methyl-4-(2-methoxybenzeneazo)-5-pyrazolone, 1-Phenyl-3-methyl-4-<2-methoxy-benzolazo>-5-pyrazolon

2,4-dihydro-4-[(2-methoxyphenyl)azo]-5-methyl-2-phenyl-3H-pyrazol-3-one (CAS 4645-07-2) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C17H16N4O2 and a molecular weight of 308.33500 g/mol. It is also known as Solvent Yellow 72, C.I. 127450 and 4-[(2-Methoxyphenyl)azo]-5-methyl-2-phenyl-2H-pyrazol-3(4H)-one. Key properties include a melting point of 166-167ºC, a boiling point of 505.3ºC at 760 mmHg, a density of 1.24 and a flash point of 259.4ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

4645-07-2

Jingsj CID

J-1450672-5

Molecular Formula

C₁₇H₁₆N₄O₂

Chinese Name

2,4-二氢-4-[(2-甲氧基苯基)偶氮]-5-甲基-2-苯基-3H-吡唑-3-酮

Molecular Weight

308.33500 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026