Benzoic acid, 3,3'-[(2-nitro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[6-hydroxy-, disodium salt

Preparation

4-(4-Aminophenyl)-3-nitro-aniline double nitrogen, and 2-Hydroxybenzoic acid(2 Moore) coupling.

Properties and Applications

dark red light yellow. Moderate soluble in water for green light yellow, slightly soluble in Etanol for green yellow. In concentrated sulfuric acid for orange brown, dilution after buff. Dye aqueous solution with concentrated hydrochloric acid for a light green light yellow, Join concentrated Sodium hydroxide solution for brown light orange.

Standard	Ironing Fastness	Light Fastness	Fulling		Persperation Fastness	Soaping	Water
			Alkali	Acid
ISO	5	4-5	4-5	2	5	4-5	5