dye|World dye variety

Name:C.I.Direct Black 29,C.I.22580

Molecular Structure: Double azo class

C.I.Direct Black 29,C.I.22580,CAS 3626-23-1,728.66,C32H22N6Na2O8S2,Atul Developed Black RO

Molecular Formula:C₃₂H₂₂N₆Na₂O₈S₂

Molecular Weight: 728.66

CAS Registry Number:3626-23-1

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, in alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid  (2 Moore) coupled.

Properties and Applications:  blue ash. Soluble in water (for violet black) and soluble fiber element, slightly soluble in ethanol is shallow purple, insoluble in other organic solvents. The strong sulfuric acid in blue, diluted for purple, have precipitation. The dye solution to join strong hydrochloric acid for dark, precipitation; Add thick sodium hydroxide solution for purplish red color, have precipitation.

List of Suppliers:

Atul Developed Black RO( Atul Limited  )