1. Home>
  2. Search IRUG Spectral Database>
  3. Interactive IRUG Spectrum

Interactive IRUG Spectrum

Section: 9 Organic dyes and pigments (OD) Page: 709

 Copyright © 1993-2025 Infrared and Raman Users Group (IRUG)


Details

IRUG filename:
ROD00709
Data type:
Raman
IRUG material class:
Organic dyes and pigments (OD)
Sample type:
Reference material
Common name(s):
Pigment Red 220 (PR220), Disazo Condensation, Azo, CI20055
Trade name(s):
Cromophtal Red G
CAS name:
Benzoic acid, 3,3'-[(2,5-dimethyl-1,4-phenylene)bis[iminocarbonyl(2-hydroxy-3,1-naphthalenediyl)-2,1-diazenediyl]]bis[4-methyl-, 1,1'-bis(2-chloroethyl) ester
Sample source 1:
Ciba
Sample identifier 1:
Cromophtal Red G
Sample source 2:
Tate Gallery, Tate Colorant Collection, Tom Learner
Source location 2:
Millbank, London, SW1P4RG, London, UK
Sample identifier 2:
PR220, Cromophtal Red G
Sample source 3:
Harvard Art Museums, Straus Center for Conservation & Technical Studies
Source location 3:
32 Quincy St, Cambridge, MA 02138, US
Color:
Bluish red
Application:
Raman microscopy/microspectroscopy
Excitation source (nm):
785
Mode:
Scat
Originating institution name:
Museum of Fine Arts Boston
Originating institution acronym:
MFAB
Molecular formula:
C50 H42 Cl2 N6 O8
CAS registry no:
68259-05-2
  

Related Structure(s)

IRUG Structure Tracking #: 238
Common Name(s): Pigment Red 220 (PR220); Disazo condensation; CI20055
CAS Name: Benzoic acid, 3,​3'-​[(2,​5-​dimethyl-​1,​4-​phenylene)​bis[iminocarbonyl(2-​hydroxy-​3,​1-​naphthalenediyl)​-​2,​1-​diazenediyl]​]​bis[4-​methyl-​, 1,​1'-​bis(2-​chloroethyl) ester
CAS Registry No: 68259-05-2
IRUG Material Class: Organic dyes and pigments (OD)
Molecular Formula: C50 H42 Cl2 N6 O8
MW: 925.81