dye|World dye variety

Name:C.I.Direct Red 68,C.I.23515

Molecular Structure: Double azo class

C.I.Direct Red 68,C.I.23515,CAS 6405-98-7,589.6,C30H24N5NaO5S,Congo 4R

Molecular Formula:C₃₀H₂₄N₅NaO₅S

Molecular Weight: 589.6

CAS Registry Number:6405-98-7

Manufacturing Methods : 3,3′-Dimethylbenzidine double nitriding, respectively with the 4-Hydroxynaphthalene-1-sulfonic acid and Resorcinol coupling .

Properties and Applications: red. Soluble in water is palm red light. The strong sulfuric acid for blue, purple precipitation after diluted; In a dilute acetic acid with brown in the precipitation. The dye solution to join strong hydrochloric acid has the purple precipitation; Add thick sodium hydroxide solution no change.

List of Suppliers:

Congo 4R( Aktiengesellschaft für Anilin-Fabrikation )