Turcas, Crina Valentina published the artcileAzo dye complexes. Synthesis and tinctorial properties, COA of Formula: C10H9NO4S, the publication is Scientific Bulletin – University “Politehnica” of Bucharest, Series B: Chemistry and Materials Science (2012), 74(1), 109-118, database is CAplus.
Exptl. results concerning synthesis of copper, cobalt, and chromium complex combinations with azo dyes starting from 1-diazo-2-naphthol-4-sulfonic acid and 6-nitro-1-diazo-2-naphthol-4-sulfonic acid by coupling with β-naphthol or 4-(diethylamino)-2-naphthol are presented. These complex combinations were characterized by elemental chem. anal. and electronic and IR spectra. Their dyeing properties on wool and polyamide were determined
Scientific Bulletin – University “Politehnica” of Bucharest, Series B: Chemistry and Materials Science published new progress about 116-63-2. 116-63-2 belongs to naphthyridine, auxiliary class Sulfonic acid,Amine,Naphthalene,Alcohol,Organic Pigment, name is 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, and the molecular formula is C11H12O4, COA of Formula: C10H9NO4S.
Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem