dye|World dye variety

Name:C.I.Direct Violet 21,C.I.23520

Molecular Structure: Double azo class

C.I.Direct Violet 21,C.I.23520,CAS 6470-45-7,725.70,C34H25N5Na2O7S2,Brilliant Pink IR,Triasol Pink IR

Molecular Formula:C₃₄H₂₅N₅Na₂O₇S₂

Molecular Weight: 725.70

CAS Registry Number:6470-45-7

Manufacturing Methods :  3,3′-Dimethylbenzidine double nitriding, first with 4-Aminonaphthalene-1-sulfonic acid matches, again with 4-Hydroxynaphthalene-1-sulfonic acid coupling. In some brands are available in 6-Aminonaphthalene-1-sulfonic acid instead of 4-Hydroxynaphthalene-1-sulfonic acid.

Properties and Applications: dark red light purple. Soluble in water for Red sauce, soluble in ethanol for product Red. The strong sulfuric acid for blue, blue for red after diluted. The dye solution to join strong hydrochloric acid for hidden cyan, have precipitation; Add thick sodium hydroxide solution for red wine.

List of Suppliers:

Arlindone Brilliant Pink IR Extra (ARL)

Triasol Pink IR(Chemische Fabriek Triade BV)