4-Nitrosophenol, 4-Nitrophenol or 4-Aminophenol and Sodium sulfide and sulfur heating. Through the following methods: (a) sulfide in the return of boiling or (b) 209 ~ 300 ℃ calcination. The (b) method for dye color shade darker.
Properties and Applications
olive green. good solubility in sodium sulfide solution, for olive.
