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nature : a p-type acid dyes. Orange yellow powder. Water soluble yellow, met sulfate aqueous solution, nitric acid, hydrochloric acid and sodium hydroxide are still yellow. Mainly used in food, beverages, cosmetics and pharmaceuticals and cosmetics coloring, can also be used for wool and silk dyeing and manufacture of color amylin. By sulfanilic acid by diazotization, with 1-(4-methyl-phenyl) - 3 - carboxy-5-Pyrazolone in alkaline solution coupling, which refined.
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