dye|World dye variety

Name:C.I.Direct Red 34,C.I.23570

Molecular Structure: Double azo class

C.I.Direct Red 34,C.I.23570,CAS 574-65-2,826.76,C34H25N6Na3O9S3,Brimant Congo R

Molecular Formula:C₃₄H₂₅N₆Na₃O₉S₃

Molecular Weight: 826.76

CAS Registry Number:574-65-2

Manufacturing Methods : 3,3′-Dimethylbenzidine double nitriding, first coupling with 3-Aminonaphthalene-2,7-disulfonic acid, again with 6-Aminonaphthalene-2-sulfonic acid coupling.

Properties and Applications: red. Soluble in water for red orange, slightly soluble in ethanol for Shallow red brown, insoluble in other organic solvents. In the strong sulfuric acid as dark blue, Red sauce for diluted. The dye solution to join strong hydrochloric acid for orange brown; Add thick sodium hydroxide solution for red orange, precipitation.

List of Suppliers:

Brimant Congo R ( Aktiengesellschaft für Anilin-Fabrikation )