Direct Blue 75
Name:C.I.Direct Blue 75,C.I.34220
Molecular Structure: trisazo class
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 acid diazo, and 5-Aminonaphthalene-2-sulfonic acid coupling, its product to diazo, and 5-Aminonaphthalene-2-sulfonic acid coupling, again diazo, in alkaline conditions and 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid coupling.
Properties and Applications: dark blue. Soluble in water for blue, insoluble in other organic solvents. In the dark for the strong sulfuric acid, diluted to red light purple red for brown. The dye solution to join strong hydrochloric acid for blue; Add thick sodium hydroxide solution for red light purple
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 4-5 | 4 | 5 | 2-3 | 3 | ||
| AATCC | 4 | 3-4 | 4-5 | 2 | 3 | ||
List of Suppliers:
ACDI Blue GL 200% (Aakash Chemicals & Dyestuffs Inc)
Burco Direct Blue 2GL(Classic Dyestuffs Inc)
Burco Direct Blue 2GLB 200%(Classic Dyestuffs Inc)
Carta Blue 2GL ( Clariant GmbH )
Direct Blue 2GL ( Global Colors Inc. )
Direct Blue 2GL 200%(Classic Dyestuffs Inc)
Direct Blue 2GLB(Classic Dyestuffs Inc)
Direct Fast Blue 2GL(Shandong Qing Shun Chemical Co., Ltd.)
Intralite Blue 2GL (Yorkshire Group pic)
Intralite Blue 2GL (Classic Dyestuffs Inc)
Intralite Blue 2GL Conc(Classic Dyestuffs Inc)
Solar Blue 2GL( Clariant GmbH )