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Section: 9 Organic dyes and pigments (OD) Page: 589

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


Details

IRUG filename:
ROD00589
Data type:
Raman
IRUG material class:
Organic dyes and pigments (OD)
Sample type:
Reference material
Common name(s):
Pigment Red 50 (PR50), β-Naphthol, Na, Azo Lake (Salt Type), CI15500
Trade name(s):
Lackrot D
CAS name:
Benzoic acid, 2-​[2-​(2-​hydroxy-​1-​naphthalenyl)​diazenyl]​-​, sodium salt (1:1)
Sample source 1:
Farbwerke vorm. Meister Lucius & Brüning (Farbwerke L&B)
Source location 1:
Hochst, DE
Sample identifier 1:
Lackrot D
Sample source 2:
Historical Dye Collection, Dresden University of Technology (TU)
Source location 2:
Helmholtzstr. 10, Dresden, DE
Sample identifier 2:
Ref. 575
Sample source 3:
Royal Institute for Cultural Heritage (KIK/IRPA)
Source location 3:
Jubelpark 1, 1000 Brussels, BE
Color:
Red
MW (relative):
314.27, calculated
Application:
Raman microscopy
Excitation source (nm):
785
Mode:
Scat
Literature Reference:
Fremout, W., & Saverwyns, S. (2012). Identification of synthetic organic pigments: the role of a comprehensive digital Raman spectral library. Journal of Raman Spectroscopy, 43(11), 1536–1544.
Originating institution name:
Royal Institute for Cultural Heritage
Originating institution acronym:
KIK/IRPA
Molecular formula:
C17 H11 N2 O3 * Na
CAS registry no:
5850-76-0