1 part of? 4-Methylbenzene-1,3-diamine and ?2 to 4 parts of??sulfur in 190 ~ 250 ℃ calcination 15 to 24 hours, and its coarse product with Sodium hydroxide or Sodium sulfide solution treatment (BIOS 1155, – 28). Product hue by sulfurized temperature and reaction time and decide, high temperature and long time the orange dye with red light, and low temperature short time will bring yellow.
Properties and Applications
yellow orange to red orange. Yellow brown powder. Insoluble in water. In the Sodium sulfide solution solubility is good, for yellow orange; Slightly soluble in concentrated sulfuric acid. Dyeing content in alkaline insurance powder solution slightly change; Sodium hypochlorite solution in almost all fade; Join concentrated sulfuric acid into yellow brown to brown.
