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nature : yellow powder. Vulnerable to dissolve in water and ethanol and yellow. Soluble acetone. Benzene-soluble. For dyeing wool and silk. Its color precipitate barium salt used for paint and paper, such as paint. Also for phenolic resin, urea formaldehyde resin, melamine resin coloring. By aniline by diazotization after 1-sulfonic acid Phenyl-3 - Methyl-5-Pyrazolone coupling and prepared.
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