dye|World dye variety

Name:C.I.Direct Red 191,C.I.17900

Molecular Structure: Double azo class

C.I.Direct Red 191,C.I.17900,CAS 12167-52-1,768.64,C28H19N4Na3O12S3,Formann Orange R

Molecular Formula:C₂₈H₁₉N₄Na₃O₁₂S₃

Molecular Weight: 768.64

CAS Registry Number:12167-52-1

Manufacturing Methods : Amino acid methyl diazo, coupled with N,N’-bis(4-hydroxy-2-sulfonaphthalene-7-yl)urea.

Properties and Applications:  yellow light red. Soluble in water for yellow light red, slightly soluble in ethanol and soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid to red light purple, diluted for colourful red. The dye solution to join a little red 10% sulfuric acid solution; Add 10% sodium hydroxide solution for shallow blue light purplish red color.

List of Suppliers:

Formann Orange R( American Aniline Products Inc. )