dye|World dye variety

Name:C.I.Direct Blue 16,C.I.22475

Molecular Structure: Double azo class

C.I.Direct Blue 16,C.I.22475,CAS 6426-66-0,815.70,C32H20N5Na3O11S3

Molecular Formula:C₃₂H₂₀N₅Na₃O₁₁S₃

Molecular Weight: 815.70

CAS Registry Number:6426-66-0

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, in alkaline conditions and 4-Amino-5-hydroxynaphthalene-1-sulfonic acid coupling, and then and 8-Hydroxynaphthalene-1,6-disulfonic acid coupling.

Properties and Applications: dark red light purple to red light navy blue. Soluble in water for blue purple, not soluble in alcohol. The strong sulfuric acid for blue, purple precipitation after diluted. The dye solution to join hydrochloric acid blue precipitation; Add thick sodium hydroxide solution for red wine.

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