4-Aminophenol-2,6-disulfonic acid diazotization, and Benzene-1,2,3-triol coupling.
Properties and Applications
red light brown. Soluble in water for green light yellow, not soluble in ethanol. In concentrated sulfuric acid for yellow brown, dilution after green yellow. Dye aqueous solution to join concentrated hydrochloric acid for green yellow until golden brown, Join concentrated sodium hydroxide solution for red orange brown.
