4,4'-[(3,3'-dimethoxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[2,4-dihydro-5-methyl-2-(p-tolyl)-3H-pyrazol-3-one]

C. I. 颜料红 37

Also known as: 4,4'-[(3,3'-dimethoxy-1,1'-biphenyl-4,4'-diyl)bis(azo)]bis[2,4-dihydro-5-methyl-2-(4-methylphenyl)-3H-pyrazol-3-one], 4-[[2-methoxy-4-[3-methoxy-4-[[3-methyl-1-(4-methylphenyl)-5-oxo-4H-pyrazol-4-yl]diazenyl]phenyl]phenyl]diazenyl]-5-methyl-2-(4-methylphenyl)-4H-pyrazol-3-one, C.I. Pigment Red 37, C.I. 21205, Vulcan Fast Red G, Polymo Scarlet GR

4,4'-[(3,3'-dimethoxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[2,4-dihydro-5-methyl-2-(p-tolyl)-3H-pyrazol-3-one] (CAS 6883-91-6) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C36H34N8O4 and a molecular weight of 642.70600 g/mol. It is also known as 4,4'-[(3,3'-dimethoxy-1,1'-biphenyl-4,4'-diyl)bis(azo)]bis[2,4-dihydro-5-methyl-2-(4-methylphenyl)-3H-pyrazol-3-one], 4-[[2-methoxy-4-[3-methoxy-4-[[3-methyl-1-(4-methylphenyl)-5-oxo-4H-pyrazol-4-yl]diazenyl]phenyl]phenyl]diazenyl]-5-methyl-2-(4-methylphenyl)-4H-pyrazol-3-one and C.I. Pigment Red 37. Key properties include a boiling point of 855.3ºC at 760 mmHg, a density of 1.3g/cm3 and a flash point of 471ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

6883-91-6

Jingsj CID

J-976804-4

Molecular Formula

C₃₆H₃₄N₈O₄

Chinese Name

C. I. 颜料红 37

Molecular Weight

642.70600 g/mol

Category

Organic Compounds

Last updated

8/21/2026