Direct blue 126 (C.I. 34010)

Preparation

2-Amino-5-(4-amino-3-barboxyphenyl)benzoic acid?double nitriding, and 4-Amino-5-hydroxynaphthalene-1,3-disulfonic acid (2 Moore) coupling, and then and total to 70 ℃ hot copper sulfate to transform into copper complex.

Properties and Applications

bright blue.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
ISO	4	3	5	1-2	3	2	1-2