| Hazard Information | Back Directory | [Preparation]
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. |
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