4-Nitrophenol and Sodium polysulfide solution in Copper sulfate monohydrate existence, in 128 ~ 130 ℃ for 30 hours vulcanization reaction, and then add 4-Methylbenzene-1,3-diamine cure the product (equivalent to C.I. Sulphur Orange 1, C.I. 53050) in aqueous solution, and evaporation this mixture to dry (FIAT 764). Available 4-Aminophenol instead of 4-Nitrophenol.
Properties and Applications
olive green to dark yellow brown. In the sodium sulfide solution for yellow brown; In concentrated sulfuric acid for olive brown, dilution after olive brown precipitation.
