Pigment Orange 34

Synonyms:C.I.Pigment Orange 34; C.I.PO34; PO34; P.O.34
CAS NO.15793-73-4
Molecular Weight651.54
Molecular FormulaC34H28Cl2N8O2
ColorOrange powder

Molecular structure formula:  

Fastness Properties of Pigment Orange 34:

Light Fastness4
Heat Resistance(℃)180
Water Resistance5
Oil Resistance4-5
Acid Resistance5
Alkali Resistance5
Alcohol Resistance4-5

Main application: Water based ink, Offset ink, Solvent based ink, Plastic, Paint, Textile printing

We have various pigment grades and properties to meet different customers’ needs, please specify your application and requirements so that we can recommend accordingly.  E-mail: sy@sypigment.com

Product Description of Pigment Orange 34:

Mainly used for packaging ink and pigment printing, light fastness 5~6 (1/3 SD), dry cleaning resistance; used for soft PVC, polyolefin (200℃); good light and weather fastness in coatings, The high hiding power formulation has excellent fluidity; and can replace molybdenum red in agricultural machinery and construction coatings.

Pigment Orange 34, in the form of an orange powder, is a disazopyrazolone dye that can be used in printing ink applications. This product has a specific gravity between 1.30 and 1.50, a bulk volume between 4.8 and 5.3 l/kg, and an average particle size between 100 and 200 nanometers.

TDS (Pigment Orange 34) MSDS (Pigment Orange 34)


  • 15793-73-4
  • C.I. Pigment Orange 34
  • Benzidine Orange T
  • 4-[[2-chloro-4-[3-chloro-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
  • 3H-Pyrazol-3-one, 4,4′-[(3,3′-dichloro[1,1′-biphenyl]-4,4′-diyl)bis(2,1-diazenediyl)]bis[2,4-dihydro-5-methyl-2-(4-methylphenyl)-
  • 3H-Pyrazol-3-one,4,4′-[(3,3′-dichloro[1,1′-biphenyl]-4,4′-diyl)bis(azo)]bis[2,4-dihydro-5-methyl-2-(4-methylphenyl)-
  • Irgalite orange F2G
  • 4,4′-((3,3′-Dichloro(1,1′-biphenyl)-4,4′-diyl)bis(azo))bis(2,4-dihydro-5-methyl-2-(p-tolyl)-3H-pyrazol-3-one)
  • Orange HF
  • 3H-Pyrazol-3-one, 4,4′-((3,3′-dichloro(1,1′-biphenyl)-4,4′-diyl)bis(2,1-diazenediyl))bis(2,4-dihydro-5-methyl-2-(4-methylphenyl)-
  • Vynamon Orange RE-FW
  • C.I. 21115
  • Roma Orange B 112700
  • SCHEMBL2449957
  • SCHEMBL9228544
  • DTXSID60864640
  • EINECS 239-898-6
  • C.I.21115
  • EC 239-898-6
  • 793P734
  • W-110417
  • 3H-Pyrazol-3-one, 4,4′-((3,3′-dichloro(1,1′-biphenyl)-4,4′-diyl)bis(azo))bis(2,4-dihydro-5-methyl-2-(4-methylphenyl)-
  • 4,4′-(3,3′-Dichloro-4,4′-biphenylene)bis(azo))bis(1-(4-methylphenyl)-3-methyl-5-pyrazolone)

IUPAC Name:  4-[[2-chloro-4-[3-chloro-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

InChI: InChI=1S/C34H28Cl2N8O2/c1-19-5-11-25(12-6-19)43-33(45)31(21(3)41-43)39-37-29-15-9-23(17-27(29)35)24-10-16-30(28(36)18-24)38-40-32-22(4)42-44(34(32)46)26-13-7-20(2)8-14-26/h5-18,31-32H,1-4H3


Canonical SMILES: CC1=CC=C(C=C1)N2C(=O)C(C(=N2)C)N=NC3=C(C=C(C=C3)C4=CC(=C(C=C4)N=NC5C(=NN(C5=O)C6=CC=C(C=C6)C)C)Cl)Cl

Property NameProperty Value
Molecular Weight651.5
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count8
Rotatable Bond Count7
Exact Mass650.1712276
Monoisotopic Mass650.1712276
Topological Polar Surface Area115 Ų
Heavy Atom Count46
Formal Charge0
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count2
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
Covalently-Bonded Unit Count1
Compound Is CanonicalizedYes