dye|World dye variety

Name:C.I.Direct Blue 58,C.I.22490

Molecular Structure: Double azo class

C.I.Direct Blue 58,C.I.22490,CAS 6426-69-3,816.68,C32H19N4Na3O12S3,Dianil Blue 4R

Molecular Formula:C₃₂H₁₉N₄Na₃O₁₂S₃

Molecular Weight: 816.68

CAS Registry Number:6426-69-3

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, First coupling with 4,5-Dihydroxynaphthalene-2,7-disulfonic acid coupling, again with 6-Hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications: dark red light blue. Soluble in water for purple. The strong sulfuric acid in blue, diluted into purple solution, then a red light purple precipitation. The dye solution to join hydrochloric acid have red light purple precipitation; Sodium hydroxide solution to a red solution.

List of Suppliers:

Dianil Blue 4R( Farbwerke vorm. Meister Lucius &Brtining )