dye|World dye variety

Name:C.I.Direct Brown 46,C.I.31785

Molecular Structure: trisazo class

C.I.Direct Brown 46,C.I.31785,CAS 8003-51-8,883.75,C39H24N7Na3O10S2

Molecular Formula:C₃₉H₂₄N₇Na₃O₁₀S₂

Molecular Weight: 883.75

CAS Registry Number:8003-51-8

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, again with 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid coupling, its product to diazo, in alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications: dark brown olive green light. Soluble in water for palm light olive, soluble in ethanol. The strong sulfuric acid in the navy for, for the shallow olive gray after diluted. The dye solution to join strong hydrochloric acid have Gray light purple precipitation; Add thick sodium hydroxide solution have orange brown precipitation.

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