dye|World dye variety

Name:C.I.Direct Brown 27,C.I.31725

Molecular Structure: trisazo class

C.I.Direct Brown 27,C.I.31725,CAS 6360-29-8,867.75,C39H24N7Na3O9S2,Direct Chrome Brown A,Vopsider Brown DMG

Molecular Formula:C₃₉H₂₄N₇Na₃O₉S₂

Molecular Weight: 867.75

CAS Registry Number:6360-29-8

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, and with 8-Aminonaphthalene-2-sulfonic acid coupling, its product to diazo, and 5-Aminonaphthalene-2-sulfonic acid coupling.

Properties and Applications: dark red light brown. Soluble in water for brown, soluble in ethanol is shallow red sauce. The strong sulfuric acid for blue to blue-black, diluted with light olive green precipitation. The dye solution to join strong hydrochloric acid have olive green precipitation; Add thick sodium hydroxide solution have orange brown precipitation.

List of Suppliers:

Direct Chrome Brown A ( Colorom SA )

Vopsider Brown DMG ( Colorom SA )