dye|World dye variety

Name:C.I.Direct Red 189,C.I.28400

Molecular Structure: Double azo class

C.I.Direct Red 189,C.I.28400,CAS 5905-31-7,886.77,C35H25N6Na3O12S3,Formanil Rubine G

Molecular Formula:C₃₅H₂₅N₆Na₃O₁₂S₃

Molecular Weight: 886.77

CAS Registry Number:5905-31-7

Manufacturing Methods :  4-Aminobenzenesulfonic acid diazo, and 2,5-Dimethylbenzenamine coupling, its product to diazo, coupled with N,N’-bis(4-hydroxy-2-sulfonaphthalene-7-yl)urea.

Properties and Applications: red. Soluble in water for purplish red color, soluble in ethanol and soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid for green light blue and dark red light blue after diluted precipitation. The dye solution to join 10% sulfuric acid as shallow dark red light blue; Add 10% sodium hydroxide solution for shallow purplish red color.

List of Suppliers:

Formanil Rubine G( American Aniline Products Inc. )