Structural Determination of Unknown Subsidiary Colors in Food Yellow No. 5(Sunset Yellow FCF)

Major unknown subsidiary colors A (Sub A) and B (Sub B) in commercial Sunset Yellow FCF (Food Yellow No. 5 in Japan) have been isolated by preparative HPLC. Spectroscopic analyses of Sub A and Sub B revealed that their structures are trisodium salt of 6-hydroxy-7-(4-sulfophenyl)-5-(4-sulfophenylazo)...

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Veröffentlicht in:	Chemical & pharmaceutical bulletin 1996/08/15, Vol.44(8), pp.1624-1627
Hauptverfasser:	YAMADA, Makiko, NAKAMURA, Mikio, YAMADA, Takashi, MAITANI, Tamio, GODA, Yukihiro
Format:	Artikel
Sprache:	eng
Schlagworte:	Azo Compounds - analysis Biological and medical sciences Chromatography, High Pressure Liquid coal-tar dye FD & C Yellow No. 6 Food Analysis - methods Food Coloring Agents - analysis Food Yellow No. 5 General pharmacology Magnetic Resonance Spectroscopy Mass Spectrometry Medical sciences Pharmaceutical technology. Pharmaceutical industry Pharmacology. Drug treatments Spectrophotometry, Ultraviolet subsidiary color Sunset Yellow FCF
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Beschreibung
Zusammenfassung:	Major unknown subsidiary colors A (Sub A) and B (Sub B) in commercial Sunset Yellow FCF (Food Yellow No. 5 in Japan) have been isolated by preparative HPLC. Spectroscopic analyses of Sub A and Sub B revealed that their structures are trisodium salt of 6-hydroxy-7-(4-sulfophenyl)-5-(4-sulfophenylazo)-2-naphthalenesulfonic acid, and disodium salt of 3-hydroxy-4-(4-sulfophenylazo)-2-naphtalenesulfonic acid, respectively.
ISSN:	0009-2363 1347-5223
DOI:	10.1248/cpb.44.1624