2-Hydroxy-8-aminophenazine;8-aminophenazin-2-ol and sodium polysulphide?aqueous solution heating, in the presence of copper sulfate in 115 ~ 106 ° C reflux 6 hours (BIOS 1155, 29). This is Pyridine by 2,4 – diamino-4′- hydroxy diphenylamine?air oxidation and have to.
Properties and Applications
dark purplish red. Deep red powder. In concentrated sulfuric acid for brown light purple, red precipitation after dilution. Used for cotton, hemp, viscose fiber dyeing, also can be used in the leather dyeing.
