4-((4-Aminophenyl)diazenyl)benzenesulfonic acid diazotization, and 2-Hydroxybenzoic acid coupling.
Properties and Applications
brilliant orange to dark orange (aluminum); Dark red light orange (chromium). Red orange powder. Soluble in water for yellow to orange solution, solubility for 80 g/l (80 ℃), slightly soluble in Etanol and Acetone. In concentrated sulfuric acid to red light purple, yellow light orange after diluted for; In concentrated hydrochloric acid for purple, placed after decolorizing. The aqueous solution was added concentrated hydrochloric acid was light brown-yellow. Mainly used for wool fabric dyeing, dyeing scattered hair, tops, blankets and wool fabric, also can be used for silk, nylon, leather and fur dyeing.
