dye|World dye variety

Name:C.I.Direct Red 44,C.I.22500

Molecular Structure: Double azo class

C.I.Direct Red 44,C.I.22500,CAS 2302-97-8,698.63,C32H20N4Na2O8S2,Atul Direct Rubine B

Molecular Formula:C₃₂H₂₀N₄Na₂O₈S₂

Molecular Weight: 698.63

CAS Registry Number:2302-97-8

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, and 7-Hydroxynaphthalene-1-sulfonic acid (2 Moore) coupled.

Properties and Applications: dark red to blue light red violet. Soluble in water for product red to red light purple, slightly soluble in alcohol. The strong sulfuric acid for purple, diluted with light purple (a red); In nitric acid in red orange for solution. The dye solution to join strong hydrochloric acid for navy, precipitation; Add thick sodium hydroxide solution for red light brown, have precipitation.

List of Suppliers:

Atul Direct Rubine B( Atul Limited  )