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

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.

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