Direct Blue 63
Name:C.I.Direct Blue 63,C.I.31910
Molecular Structure: trisazo class
C.I.Direct Blue 63,C.I.31910,CAS 6441-90-3,1084.95,C44H28N6Na4O14S4
Molecular Formula:C44H28N6Na4O14S4
Molecular Weight: 1084.95
CAS Registry Number:6441-90-3
Manufacturing Methods : 3,3′-Dimethylbenzidine double nitriding, first with Naphthalen-1-amine coupling, its product to diazo, and 8-Hydroxynaphthalene-1,6-disulfonic acid (2 Moore) coupled.
Properties and Applications: red light navy blue. Soluble in water for blue, soluble in ethanol for red light purple. In the dark for the strong sulfuric acid, after diluted blue precipitation; In the nitric acid for brown. The dye solution to join strong hydrochloric acid blue precipitation; Add thick sodium hydroxide solution have blue precipitation.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 3-4 | 4 | 3 | 2 | 2-3 | ||
| AATCC | 5 | 4 | 2 | 3-4 | 1-2 | ||
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