2-Naphthalenesulfonic acid, 5(or 8)-[(2,8-dihydroxy-6-sulfo-1-naphthalenyl)azo]-8(or 5)-[[4-(phenylazo)-6(or 7)-sulfo-1-naphthalenyl]azo]-, trisodium salt

aniline diazo, and 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid coupling, again diazo, and 5-Aminonaphthalene-2-sulfonic acid?and?8-Aminonaphthalene-2-sulfonic acid??coupling, product to diazo, and 4,6-Dihydroxynaphthalene-2-sulfonic acid coupling.

grey.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
ISO	4	2	6	3	3	3	3