dye|World dye variety

Name:C.I.Direct Red 169,C.I.25000

Molecular Structure: Double azo class

C.I.Direct Red 169,C.I.25000,CAS 6391-12-4,772.68,C32H22N8Na2O9S2,Diamine Nitrazol Bordeaux GB

Molecular Formula:C₃₂H₂₂N₈Na₂O₉S₂

Molecular Weight: 772.68

CAS Registry Number:6391-12-4

Manufacturing Methods :  (a) M-nitroaniline diazo, in acid conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling, then use glucose and sodium hydroxide solution will nitro reduction; (b) 3-(3-(3-Aminophenyl)-1-oxadiaziridin-2-yl)benzenamine double nitriding, in acid conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid (2 Moore) coupled.

Properties and Applications: dark red. Soluble in water for orange brown, slightly soluble in alcohol. The strong sulfuric acid for dark olive brown, for yellow brown after diluted. The dye solution to join strong hydrochloric acid for dark brown, have precipitation; Add thick sodium hydroxide solution for palm light orange to brown.

List of Suppliers:

Diamine Nitrazol Bordeaux GB( Carbotex Consultants )