Direct Blue 48
Name:C.I.Direct Blue 48,C.I.22565
Molecular Structure: Double azo class
C.I.Direct Blue 48,C.I.22565,CAS 6459-89-8,830.71,C32H21N6Na3O11S3
Molecular Formula:C32H21N6Na3O11S3
Molecular Weight: 830.71
CAS Registry Number:6459-89-8
Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, in alkaline conditions in turn and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acidcoupling.
Properties and Applications: dark red light blue and red light navy. Soluble in water, slightly soluble in ethanol and acetone. The strong sulfuric acid for blue; In nitric acid for gray.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 4-5 | 5 | 3 | 2 | 2 | ||
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