7-[[4-[(2,4-Diamino-5-nitrophenyl)azo]benzoyl]amino]-4-hydroxy-3-[(4-sodiosulfophenyl)azo]naphthalene-2-sulfonic acid sodium salt

4-Aminobenzenesulfonic acid diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid?coupling, and then diazo, and 4-Nitrobenzene-1,3-diamine coupling between.

bright orange. Soluble in water for orange, and adequate soluble in alcohol for golden brown to orange. The strong sulfuric acid for blue-ray in red, orange for gold after diluted. The dye solution to join strong hydrochloric acid for gold orange; With strong sodium hydroxide solution for palm light orange. Can be used for cellulose fiber dyeing. Neutral and alkaline white is good, good levelness.

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