Benzenesulfonic acid, 4-[[4-[(4-hydroxyphenyl)amino]phenyl]amino]-, reaction products with sodium sulfide (Na2(Sx)), leuco derivs.

4-(4-Hydroxyanilino)diphenylamine-4,-sulfonic acid?with Sodium polysulfide solution heating, in 105 ~ 106 ℃ under reflux 100 hours and then in the 70 ~ 80 ℃ blowing air, and add salt to make its precipitation. This indophenol?by?4-(Phenylamino)benzenesulfonic acid?and?4-Nitrosophenol?of condensation product reduction, can also be used by hydrochloric acid Manganese dioxide oxidation?4-(Phenylamino)benzenesulfonic acid?and where did?4-Aminophenol?and the mixture.

blue. Blue powder. Slightly soluble in hot water, soluble in Sodium sulfide, almost colorless. In concentrated sulfuric acid for cobalt blue, dilution after blue precipitation, insoluble in other organic solvent. Used for cotton, viscose, linen fabric and vinylon/cotton blended fabric dyeing, also used in leather and paper dyeing.