Preparation
4-(4-Aminophenyl)benzenamine double nitriding, and 2-Hydroxybenzoic acid?coupling, 4-Aminobenzenesulfonic acid diazo, and 4-Methylbenzene-1,3-diamine coupling, its products and producing again 4-(4-Aminophenyl)benzenamine?derivatives coupling.
Properties and Applications
brown. Soluble in water for yellow olive brown, slightly soluble in alcohol. The strong sulfuric acid is a deep in the navy, diluted light orange for subtle stitching. The dye solution to join strong hydrochloric acid have yellow brown precipitation; Add thick sodium hydroxide solution have brown light orange precipitation.
![disodium 5-[[4'-[[2,6-diamino-3-methyl-5-[(4-sulphonatophenyl)azo]phenyl]azo][1,1'-biphenyl]-4-yl]azo]salicylate Structure](https://www.chemicalbook.com/CAS/GIF/2586-58-5.gif)