Direct Blue 65
Name:C.I.Direct Blue 65,C.I.24220
Molecular Structure: Double azo class
C.I.Direct Blue 65,C.I.24220,CAS 6473-26-3,875.75,C34H24N5Na3O13S3
Molecular Formula:C34H24N5Na3O13S3
Molecular Weight: 875.75
CAS Registry Number:6473-26-3
Manufacturing Methods : 3,3′-Dimethoxylbenzidine double nitriding, and 8-Hydroxynaphthalene-1,6-disulfonic acid , and then in three alkaline conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling.
Properties and Applications: red light blue. Soluble in water for blue, soluble in ethanol, slightly soluble in acetone, insoluble in other organic solvents. The strong sulfuric acid for blue-ray in green. The dye solution to join strong hydrochloric acid for purple to blue.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 5 | 5 | 4 | 3 | 3 | ||
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