4-(4-Aminonaphthalen-1-ylamino)phenol Copper sulfate monohydrate in the presence of Sodium polysulfide solution with heating, in 120 ℃ under reflux 30 hours, then in 60 ℃ blowing air, settling the dye. This is determined by indophenol Naphthalen-1-amine, and 4-Aminophenol was oxidized with sodium hypochlorite, and sodium hydride reduction with sulfur derived?(BIOS 983, 91 -92).
