Pigment Red 8

Product NamePIGMENT RED 8
SynonymsC.I.Pigment Red 8; C.I.PR8; PR8; P.R.8
CAS NO.6410-30-6
Molecular Weight:460.87
Molecular FormulaC24H17ClN4O4
ColorRed powder

Molecular structure formula:

Fastness Properties of Pigment Red 8:

Light Fastness5
Heat Resistance(℃)140
Water Resistance4-5
Oil Resistance4-5
Acid Resistance4-5
Alkali Resistance4
Alcohol Resistance2

Main application: Paint & coating

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 Red 8:

Mainly used for the coloring of inks, paints, cultural and educational supplies and cosmetics.There are 20 kinds of commercial formulation grades of this pigment, which give pure blue red color, high color strength, and bright color light. It is mainly used for the coloring of printing ink. The transparent formulation will recrystallize in the packaging printing ink, affecting the color power and transparency, but it is sensitive to varnish and sterilization treatment, heat resistance 140℃/30min; it can also be used for light fastness requirements Not high fabric printing.

Pigment Red 8 affords clean, bluish shades of red. It is primarily used in the printing ink industry. It exhibits high tinctorial strength and produces brilliant prints. This product is used in prints which require no particular solvent resistance. The prints are fast to soap but not entirely stable to butter and paraffin. Pigment Red 8 is used in a variety of special media outside the paints, printing inks, and plastics field, which is also true for other members of this class of pigments. One such application is in the paper industry, where the pigment is used for mass coloration and surface coating formulations. It also lends itself to application in artists’ colors and office articles.
TDS (Pigment Red 8) MSDS (Pigment Red 8)


  • 6410-30-6
  • Pigment Red 8
  • 2-Naphthalenecarboxamide, N-(4-chlorophenyl)-3-hydroxy-4-[(2-methyl-5-nitrophenyl)azo]-
  • N-(4-chlorophenyl)-3-hydroxy-4-[(2-methyl-5-nitrophenyl)diazenyl]naphthalene-2-carboxamide
  • 2-Naphthalenecarboxamide, N-(4-chlorophenyl)-3-hydroxy-4-((2-methyl-5-nitrophenyl)azo)-
  • 2-Naphthalenecarboxamide,N-(4-chlorophenyl)-3-hydroxy-4-[(2-methyl-5-nitrophenyl)azo]-
  • N-(4-Chlorophenyl)-3-hydroxy-4-((2-methyl-5-nitrophenyl)azo)naphthalene-2-carboxamide
  • Pigment Permanent Red F4R
  • EINECS 229-100-4
  • Pigment red 8, tech
  • Organic Pigment Red 8
  • SCHEMBL6840910
  • DTXSID5064332
  • SCHEMBL21436677
  • MFCD01940655
  • AKOS025310988
  • ZINC100045248
  • 2-Naphthalenecarboxamide, N-(4-chlorophenyl)-3-hydroxy-4-(2-(2-methyl-5-nitrophenyl)diazenyl)-
  • O860
  • C.I.12335
  • 410P306
  • W-110138

IUPAC Name: N-(4-chlorophenyl)-3-hydroxy-4-[(2-methyl-5-nitrophenyl)diazenyl]naphthalene-2-carboxamide
InChI: InChI=1S/C24H17ClN4O4/c1-14-6-11-18(29(32)33)13-21(14)27-28-22-19-5-3-2-4-15(19)12-20(23(22)30)24(31)26-17-9-7-16(25)8-10-17/h2-13,30H,1H3,(H,26,31)
Canonical SMILES: CC1=C(C=C(C=C1)[N+](=O)[O-])N=NC2=C(C(=CC3=CC=CC=C32)C(=O)NC4=CC=C(C=C4)Cl)O

Property NameProperty Value
Molecular Weight460.9
Hydrogen Bond Donor Count2
Hydrogen Bond Acceptor Count6
Rotatable Bond Count4
Exact Mass460.0938327
Monoisotopic Mass460.0938327
Topological Polar Surface Area120 Ų
Heavy Atom Count33
Formal Charge0
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
Covalently-Bonded Unit Count1
Compound Is CanonicalizedYes
[Data From:PubChem]