4-(2,4-Dinitrophenylamino)phenol of cold water suspension added to 95 ℃ of Sodium polysulfide solution when the reduction reaction is completed, in 114 ~ 115 ℃ reflux heating, then diluted, injection Ferrous chloride solution, and drum drying the mixture (FIAT 764)
Properties and Applications
blue black. In the Sodium sulfide solution for blue black
