Leuco polysulfided 4-[(2,4-dinitrophenyl)amino]phenol Chemical Properties

Density 

1.68[at 20℃]

Water Solubility 

4.86mg/L at 20℃

LogP

-1 at 20℃

EPA Substance Registry System

C.I. Leuco Sulphur Blue 11 (61902-31-6)

Leuco polysulfided 4-[(2,4-dinitrophenyl)amino]phenol Usage And Synthesis

Preparation

this kind of dye is by 4-(2,4-Dinitrophenylamino)phenol?aqueous solution and sulfide. Change the purity and degree of oxidation can get different colored light blue dye, usually??the color brilliance and purity of direct proportion, and oxidation of the final product is red. (a) will be the 4-(2,4-Dinitrophenylamino)phenol?75% paste which in 90 ~ 92 ℃, at least 2 hours to add Sodium polysulfide, and in 106 ℃ reflux 3 hours, and Sodium chloride, and heating to 109 ~ 110 ℃, heat preservation 10 hours, diluted, 45 ℃ filtering, 70 ℃ drying; By this method the paste things in air oxidation, get color bright dye, its method is as follows: (b) water dilution from (a) paste content, add Sodium hydroxide, air oxidation 5 hours, salting out, filtering, and add Sodium carbonate drying; (C) if the increase of Sodium hydroxide to join quantity, air oxidation 14 ~ 16 hours, can further improve the brilliance, (d) will come from (C) with Sodium hydroxide has been the filter cake in 30 ℃ air oxidation about 18 hours, and then salting out, filtering and drying; (e) from the above product in disulfide and diacetyl Sodium acetate trihydrate solution, 95 ℃ treatment 5 hours, can still generate color is red and a brilliant dye. Dye with conventional method separation and drying (FIAT1313, 3229 -, – 230). Some vulcanization direct blue is by 4-(2,4-Dinitrophenylamino)phenol?with Sodium polysulfide solution in 135 ~ 140 ℃ calcination, then according to the above method and oxidation.

Flammability and Explosibility

Not classified

Properties and Applications

navy blue. Insoluble in water. In the Sodium sulfide solution solubility is good, for green light blue; In concentrated sulfuric acid for blue solution, dilution of dark after precipitation.Dyeing content in insurance powder for shallow olive; In Sodium hypochlorite solution all fade; Join concentrated sulfuric acid is black. Used for cotton, hemp, viscose, vinylon disseminated, jig dyeing, pad dyeing, also can be used for cotton direct printing

Leuco polysulfided 4-[(2,4-dinitrophenyl)amino]phenol(61902-31-6)Related Product Information

• Leuco Sulphur Black 6
• Leuco Sulphur Blue 3
• Oxidized sulfurized aminophenols
• Leuco Sulphur Blue 2
• Leuco Sulphur Blue 15
• Phenol, 2,4-dinitro-, sulfurized, leuco derivs.
• Benzenesulfonic acid, 4-[[4-[(4-hydroxyphenyl)amino]phenyl]amino]-, reaction products with sodium sulfide (Na2(Sx)), leuco derivs.
• Leuco Sulphur Blue 1
• Leuco sulfur black 2 (C.I. 53195)