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Molecular formula : MW : CAS :
nature : red powder blue. Water-soluble slightly soluble in ethanol and acetone. Case goods was concentrated sulfuric acid red, orange after dilution. Mainly for the dyeing of wool fabric, and also used nylon fabric dyeing. From 3-hydroxy-4-amino-1-naphthol by diazotization acid, and 1-Phenyl-3 - Methyl-5-Pyrazolone coupling and prepared.
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