8-Amino-7-methylphenazin-2-ol?and sodium polysulphide?aqueous solution in return in 115 ~ 116 ℃ heating 30 hours, then dilution, through the air and add salt to the precipitation. This is Pyridine by 4-Methylbenzene-1,3-diamine?and 4-Aminophenol or 4-Nitrosophenol generated Indophenol?oxidation and become.
Properties and Applications
bordeaux. Puce powder. Part of the soluble in water. In the sodium sulfide solution solubility is good, for the red light brown to brown; In concentrated sulfuric acid for dark blue purple, dilution after brown precipitation. Mainly used for cotton, hemp, viscose and vinylon/cotton blended fabric dyeing, suitable for dye corduroy, also used in leather dyeing.
