disodium 6-amino-4-hydroxy-5-[(4-nitro-2-sulphonatophenyl)azo]naphthalene-2-sulphonate

Dark reddish purple powder. Dissolved in water, the aqueous solution is reddish purple, adding concentrated hydrochloric acid is date red; adding concentrated sodium hydroxide solution is blue. Reddish purple when dissolved in ethanol. Soluble in ethylene glycol ether, slightly soluble in acetone and benzene, insoluble in other organic solvents. Orange-brown in concentrated sulfuric acid, purple after dilution; red solution in concentrated nitric acid, then turns to brown. When stained with copper and iron ions, the color and light are slightly darker, and when stained with chromium ions, the color and light are slightly changed.

Acid Violet 1 (CAS# 6441-91-4) is an organic azo dye used with linen fabrics.

2-Amino-5-nitrobenzenesulfonic aciddiazo, and 6-Amino-4-hydroxynaphthalene-2-sulfonic acidin acid conditions coupled.

purple. Purple powder, soluble in water (red light purple), ethanol (red light purple) and soluble fiber element, slightly soluble in acetone and benzene insoluble in other organic solvents. Meet strong sulfuric acid is orange brown, after dilute for purple; Meet nitric acid solution for red turn brown. Its water solution and strong hydrochloric acid for purplish red color, add thick sodium hydroxide solution to blue. Used for wool, wool fiber blended fabric dyeing and printing, white sex good, can also be used in leather and paper color.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
ISO	4-5	1	4	3-4	1	5	1	1
AATCC	3	1	1	3	2	2	2	2