Leuco Sulphur Blue 15

8-Amino-5-(4-hydroxyphenylamino)naphthalene-2-sulfonic acid?and aqueous Sodium polysulfide heating, in 107 ~ 108 ℃ under reflux 2 4 hours, will be part of the precipitation in the Sodium sulfide of dye solution, blowing air redeposition. This indophenol?is from?8-Amino-5-nitronaphthalene-2-sulfonic acid?and where did?5-Aminonaphthalene-2-sulfonic acid?and where did?4-Aminophenol?with Sodium hypochlorite oxidation of mixture, then use Sodium sulfide reduction and have to.

green light blue. Yellow brown flow liquid, pH value is 12.8, density 1.248, viscosity 11* 10-3 pa s.; No fallout. In the Sodium sulfide solution good solubility, olive, In concentrated sulfuric acid for the dark,?diluted with dark blue.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Fulling	Persperation Fastness	Soaping
						Moderate	Severe
ISO	3-4	4	5-6	3-4	(Alkali)4-5	4	2
AATCC	5	4	6	3			3