3,3′-Dimethylbenzidine double nitriding, and 4-Hydroxynaphthalene-1-sulfonic acid (2 Moore) coupled.
Properties and Applications
red light purple. Soluble in water for purple. The strong sulfuric acid for blue, purple precipitation after diluted. The dye solution to join hydrochloric acid has the purple precipitation; Add sodium hydroxide solution for product red.
