dye|World dye variety

Name:C.I.Direct Blue 64,C.I.22595

Molecular Structure: Double azo class

C.I.Direct Blue 64,C.I.22595,CAS 6426-74-0,830.71,C32H21N6Na3O11S3,Niagra Blue HW

Molecular Formula:C₃₂H₂₁N₆Na₃O₁₁S₃

Molecular Weight: 830.71

CAS Registry Number:6426-74-0

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, in alkaline conditions in turn and 4-Amino-5-hydroxynaphthalene-1-sulfonic acid and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acidcoupling.

Properties and Applications: dark blue. Soluble in water for blue, slightly soluble in soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid for colourful blue, diluted for purple; In nitric acid solution for blue, to brown. The dye solution to join hydrochloric acid blue precipitation; Add 10% sodium hydroxide solution for Violet.

List of Suppliers:

Niagra Blue HW( Allied chemical Corporation  )