Acid Blue 168

Preparation

3-Amino-4-hydroxybenzenesulfonamide diazo, and 2-(Benzylideneamino)benzoic acid coupling, and then into copper complex.

Properties and Applications

red light navy blue. Blue to blue gray powder. Soluble in water. The strong sulfuric acid in Red sauce for, diluted into shallow orange solution; No change in strong hydrochloric acid, diluted into a red light blue with precipitation; In nitric acid was damaged in; In the thick of sodium hydroxide solution without change, diluted into light red light blue solution. Water solution is blue, and later have suspended shape dye exhalation, addition of suitable amount of phosphate three sodium can be improved. Used for wool, silk, silk, polyvinyl alcohol, nylon, Victoria / viscose blends, wool / rayon blended fabric dyeing and printing, also used for leather dyeing.