Name:C.I.Direct Red 28,C.I.22120

Molecular Structure: Double azo class
 
C.I.Direct Red 28,C.I.22120,CAS 573-58-0,696.67,C32H22N6Na2O6S2,Congo Red,Direct Scarlet 4B,Direct Scarlet 4BE

Molecular Formula:C32H22N6Na2O6S2

Molecular Weight: 696.67

CAS Registry Number:573-58-0

Manufacturing Methods : commonly known as Congo Red. 4-(4-Aminophenyl)benzenamine double nitriding, and 4-Aminonaphthalene-1-sulfonic acid (2 Moore) coupled.
 
Mainly used in viscose, such as cotton, wool, silk cellulose fiber dyeing.