Interactive IRUG Spectrum


IRUG filename:
Data type:
IRUG material class:
Organic dyes and pigments (OD)
Sample type:
Reference material
Common name(s):
Pigment Yellow 109 (PY109), Isoindolinone, Polycyclic, CI56284
Trade name(s):
Irgazin Yellow 2GLTN
CAS name:
1H-Isoindol-1-one, 3,3'-[(2-methyl-1,3-phenylene)diimino]bis[4,5,6,7-tetrachloro-
Sample source 1:
Ciba Specialty Chemicals Corp.
Sample identifier 1:
Irgazin Yellow 2GLTN
Sample source 2:
Washington State Patrol, Washington State Crime Laboratory
Source location 2:
2203 Airport Way South, Seattle, WA, 98104, US
Sample identifier 2:
Isoindolinone Yellow 2G (Pigment Yellow 109)
Greenish yellow
DRIFTS (diffuse reflectance infrared Fourier transform spectroscopy)
Literature Reference:
Suzuki, Edward M. “Infrared Spectra of U.S. Automobile Original Topcoats (1974–1989): VI. Identification and Analysis of Yellow Organic Automotive Paint Pigments—Isoindolinone Yellow 3R, Isoindoline Yellow, Anthrapyrimidine Yellow, and Miscellaneous Yellows.” Journal of Forensic Sciences, vol. 44, no. 6, 1999, pp. 1151–1175.
Originating institution name:
Washington State Patrol, Crime Laboratory Division
Originating institution acronym:
Molecular formula:
C23 H8 Cl8 N4 O2
CAS registry no:

Related Structure(s)

IRUG Structure Tracking #: 251
Common Name(s): Pigment Yellow 109 (PY109); Isoindole yellow; CI 56284
CAS Name: 1H-​Isoindol-​1-​one, 3,​3'-​[(2-​methyl-​1,​3-​phenylene)​diimino]​bis[4,​5,​6,​7-​tetrachloro-
CAS Registry No: 5045-40-9
IRUG Material Class: Organic dyes and pigments (OD)
Molecular Formula: C23 H8 Cl8 N4 O2
MW: 655.96