dye|World dye variety

Name:C.I.Direct Brown 26,C.I.31730

Molecular Structure: trisazo class

C.I.Direct Brown 26,C.I.31730,CAS 8003-55-2,867.75,C39H24N7Na3O9S2,Direct Daric Brown G

Molecular Formula:C₃₉H₂₄N₇Na₃O₉S₂

Molecular Weight: 867.75

CAS Registry Number:8003-55-2

Manufacturing Methods :  4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, and then and 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid coupling, its product to diazo, and 5-Aminonaphthalene-1-sulfonic acid coupling.

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

List of Suppliers:

Direct Daric Brown G( Frado )