disodium 5-((4-acetylamino-2-sulphophenyl)azo)-6-amino-4-hydroxynaphthalene-2-disulphonate

Definition

ChEBI: An organic sodium salt that is the disodium salt of 5-[(4-acetamido-2-sulfophenyl)diazenyl]-6-amino-4-hydroxynaphthalene-2-sulfonic acid. Used along with acid fuchsin as a constituent of the plasma staining solution in Lendrum's Picro-Mallory for fibrin.

Preparation

4-Acetamido-2-aminobenzenesulfonic acid diazo, and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid? in acid conditions coupled.

Properties and Applications

blue-ray red. Purple powder. It is easy to dissolve in the water, in the 100 ° C of the water solubility of 200 g/L, no solution at room temperature gather tendency, slightly soluble in ethanol purplish red. The strong sulfuric acid dyes in the dark blue for red, diluted with dark red to red light purple; In nitric acid for olive green and quickly into brown; In strong hydrochloric acid is red light purple precipitation, and add water to dissolve the diluted. Its water solution is cherry red, with strong hydrochloric acid into purple caramel?precipitation; Sodium hydroxide solution to add thick red wine. Mainly used for wool, silk and polyamide fiber and its blended fabric dyeing, can be in wool and silk fabric printing directly, can also be used for leather color. This product used for wool textiles, influential, the spell dye worsted products.