will the 4-Chloro-2-(2,4-dinitrophenylamino)phenol?in 45 ~ 70 ℃ in the 90 minutes added to sodium polysulfide, and then heated to boiling point (104 ℃), in the return of boiling 24 hours
Properties and Applications
dark purplish red. Deep red powder. In the sodium sulfide solution for deep blue light green; In concentrated sulfuric acid for brown light green, dilution after purple black precipitation. Used for cotton, hemp, viscose fabric such as dyeing.
