Preparation
2-Amino-2′,3,4′,5-tetramethylazobenzene?diazo, coupled with 3-Hydroxynaphthalene-2,7-disulfonic acid.
Properties and Applications
red. Soluble in water for blue-ray red. In the dark for the strong sulfuric acid, after diluted red brown precipitation. In water solution to join hydrochloric acid, a palm red precipitate; Add sodium hydroxide dissolved the precipitation.
