[2,6'-Bibenzothiazole]-7-sulfonic acid, 2'-[4-[[2,6-diamino-3-sulfo-5-[(3-sulfophenyl)azo]phenyl]azo]phenyl]-6-methyl-, trisodium salt

Preparation

3-Aminobenzenesulfonic acid diazo, and 2,4-Diaminobenzenesulfonic acid coupled; C.I. Direct Yellow 59 (C.I. 49000) diazo, and the generation of single accidentally coupled nitrogen compounds.

Properties and Applications

dark orange. Soluble in water for palm light orange, slightly soluble in ethanol for light golden brown. The strong sulfuric acid for quality in red (yellow), to orange red brown, diluted light orange for palm. The dye solution to join strong hydrochloric acid for orange brown;?Concentrated sodium hydroxide solution was golden orange. For the dyeing of cellulose fibers and paper colored, good leveling.

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