C.I. Direct Black 96

Preparation

8-Amino-4-hydroxynaphthalene-2-sulfonic acid diazo, and 2-Amino-4-methylanisole coupling, product to diazo, and 4-Amino-5-hydroxynaphthalene-1-sulfonic acid (0.5 Moore) and 4-Amino-5-hydroxynaphthalene-1-sulfonic acid (0.5 Moore) coupled.

Properties and Applications

blue and black. Soluble in water for the navy, and adequate soluble in alcohol to the red light blue. The strong sulfuric acid for dark blue-green, diluted for dark purple. Dye liquid water soluble join strong hydrochloric acid for violet black, precipitation; Add thick sodium hydroxide solution for deep blue.