The 58 parts ?of 4-(4-Aminophenyl)benzenamine, 123 parts of N-(4-methyl-3-nitrophenyl)acetamide?and ?142 parts of??mixture of sulfur in the 180 ~ 230 ℃ calcination 12 hours, and its product with Sodium sulfide solution treatment, sulfuric acid and precipitation (FIAT764).
