dye|World dye variety

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.

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