dye|World dye variety

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.

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