Preparation
mixed Xylidyl?diazo, and (6-Hydroxynaphthalene-2-sulfonic acid + 3-Hydroxynaphthalene-2,7-disulfonic acid) coupled.
Properties and Applications
red. Colourful red uniform powder insoluble in water was red, and, to some extent, soluble in ethanol orange, insoluble in other organic solvents. A product of sulfuric acid in red, orange is diluted. Its water solution and strong hydrochloric acid is red orange; Add thick sodium hydroxide solution is orange brown.
