Direct Dyes Direct Blue 75

C.I.Direct Blue 75,
C.I.34220,
CAS 6428-60-0,
1055.91,C42H25N7Na4O13S4,Direct Blue 2GL,Direct Fast Blue 2GL
Molecular Formula:C42H25N7Na4O13S4
Molecular Weight:1055.91
CAS Registry Number:6428-60-0
Manufacturing Methods :3-Aminobenzenesulfonic aciddiazo, and5-Aminonaphthalene-2-sulfonic acidcoupling, its product to diazo, and5-Aminonaphthalene-2-sulfonic acidcoupling, again diazo, in alkaline conditions and4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acidcoupling.
Properties and Applications:dark blue. Soluble in water for blue, insoluble in other organic solvents. In the dark for the strong sulfuric acid, diluted toredlight purple red forbrown. The dye solution to join strong hydrochloric acid for blue; Add thick sodium hydroxide solution for red light purple
C.I.Direct Blue 75,C.I.34220,CAS 6428-60-0,1055.91,C42H25N7Na4O13S4,Direct Blue 2GL,Direct Fast Blue 2GL
Molecular Formula:C42H25N7Na4O13S4
Molecular Weight:1055.91
CAS Registry Number:6428-60-0
Manufacturing Methods :3-Aminobenzenesulfonic aciddiazo, and5-Aminonaphthalene-2-sulfonic acidcoupling, its product to diazo, and5-Aminonaphthalene-2-sulfonic acidcoupling, again diazo, in alkaline conditions and4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acidcoupling.
Properties and Applications:dark blue. Soluble in water for blue, insoluble in other organic solvents. In the dark for the strong sulfuric acid, diluted toredlight purple red forbrown. The dye solution to join strong hydrochloric acid for blue; Add thick sodium hydroxide solution for red light purpleStandardAcid ResistanceAlkali ResistanceLight FastnessSoapingWaterFadingStainFadingStainISO4-5452-33AATCC43-44-523
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