1,4-Benzenedisulfonic acid, 2-[[4-[[4-[(2,4-diamino-5-nitrophenyl)azo]-6-sulfo-1-naphthalenyl]azo]-1-naphthalenyl]azo]-, trisodium salt

2-Aminobenzene-1,4-disulfonic acid diazo, and Naphthalen-1-amine coupling, again diazo, and 8-Aminonaphthalene-2-sulfonic acid coupling, its product to diazo, and 4-Nitrobenzene-1,3-diamine coupling .

dark red blue light. Soluble in water into wine red to Claret, slightly soluble in alcohol. The strong sulfuric acid for blue or gray, red sauce after dilution. The dye solution to join strong hydrochloric acid have red light brown precipitation; With strong sodium hydroxide solution have orange brown precipitation

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