dye|World dye variety

Name:C.I.Direct Brown 68,C.I.30125

Molecular Structure: trisazo class

C.I.Direct Brown 68,C.I.30125,CAS 6449-85-0,795.76,C35H27N9Na2O7S2,Columbia Brown R

Molecular Formula:C₃₅H₂₇N₉Na₂O₇S₂

Molecular Weight: 795.76

CAS Registry Number:6449-85-0

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, first and (in bicarbonate media) 6-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling, and then and 4-Aminobenzenesulfonic acid diazo, and 4-Methylbenzene-1,3-diamine coupled to a product matches.

Properties and Applications: red light brown. Soluble in water for red light brown. In the dark for the strong sulfuric acid, diluted to red orange brown. The dye solution to join strong hydrochloric acid have red light brown precipitation; Add thick sodium hydroxide solution for red light orange brown.

List of Suppliers:

Columbia Brown R( Aktiengesellschaft für Anilin-Fabrikation )