Cuprate(1-),[3-(hydroxy-kO)-4-[[1-(hydroxy-kO)-2-naphthalenyl]azo-kN1]-7-nitro-1-naphthalenesulfonato(3-)]-,sodium (9CI)

Preparation

4-Amino-3-hydroxy-7-nitronaphthalene-1-sulfonic acid diazo, and Naphthalen-1-ol?coupling, its product (C.I.Mordant Black 11, C.I. 14645) and copper sulfate ground together.

Properties and Applications

dark red light purple. Soluble in water for dark purple, soluble in alcohol. The strong sulfuric acid is a deep red in blue, diluted hairy precipitation appear brown; In the nitric acid for brown, and quickly into dark yellow; In strong hydrochloric acid for olive green, diluted into black precipitation.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
ISO	5-6	5	5	4	3	3	3-4	5