Leuco Sulphur Brown 5 Usage And Synthesis

Preparation

(1) 4-(2,4-Dinitrophenylamino)phenol?and Sodium hydroxide and water is heated to 105 ℃, then add glucose, Sodium sulfide, sulphur and a small amount of Copper sulfate monohydrate, short time boiling, in 20 hours heating to 260 ~ 270 ℃ and roasting 6 hours; (2) (1) the improvement and Sodium hydroxide solution after boiling, with acid precipitation generated degradation products and filtering, will the paste which add to the above Sodium polysulfide solution. Molten material of save glucose also can get similar dye. Further change the above operation process is to use?4-(2,4-Dinitrophenylamino)phenol?(by?2-Aminophenol?and?1-Chloro-2,4-dinitrobenzene?obtained) instead of?4-(2,4-Dinitrophenylamino)phenol.

Properties and Applications

dark brown. Black gray powder. Part of the soluble in water, moderate soluble in sodium sulfide solution, for the red light brown. In concentrated sulfuric acid to dark brown. Dyeing content in alkaline insurance powder solution for yellow brown, oxidation to recover to the original colour and lustre; Sodium hypochlorite solution in almost all fade, join concentrated sulfuric acid color darker.

Leuco Sulphur Brown 5()Related Product Information

• Formamide, N,N'-1,4-phenylenebis-, reaction products with 4-methyl-1,3-benzenediamine and sulfur, leuco derivs.
• Leuco Sulphur Brown 8
• Leuco Sulphur Brown 46
• Leuco Sulphur Brown 52
• Leuco Sulphur Brown 23
• Leuco Sulphur Brown 4
• Leuco Sulphur Brown 51
• Leuco Sulphur Brown 21
• 2-Naphthalenol, sulfurized, leuco deriv.