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Food Ponceau;C.I. Food Red 8
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nature : exterior red powder, soluble in water and goods were red, not soluble vegetable oil, ethanol is almost insoluble in concentrated sulfuric acid was purple, peach was diluted red. Their solution was concentrated hydrochloric acid plus Lu red, concentrated sodium hydroxide was added red brown, Light, good heat and alkali resistance worse, resistance to acid, benzoic acid and sulfur dioxide. Mainly used in food coloring. Is an acidic dye, dyeable wool, silk and nylon fabric. From 1-naphthol-4-sulfonic acid diazotization, with 2-naphthol -3,6,8-3 acid coupling, further refining derived.


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More Detailed Data:
1) Food Ponceau;C.I.Food Red 8
2) Food Red 8
3) 2-Naphthalenesulfonic acid, 6-[[2-amino-4-[(2-hydroxyethyl)amino]phenyl]azo]-3-[[4-[[4-[[7-[[2-amino-4-[(2-hydroxyethyl)amino]phenyl]azo]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]phenyl] amino]-3-sulfophenyl]azo]-4-hydroxy-, trisodium salt;c.i.
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