dye|World dye variety

Name:C.I.Direct Brown 51,C.I.31710

Molecular Structure: trisazo class

C.I.Direct Brown 51,C.I.31710,CAS 4623-91-0,848.71,C35H23N8Na3O10S2

Molecular Formula:C₃₅H₂₃N₈Na₃O₁₀S₂

Molecular Weight: 848.71

CAS Registry Number:4623-91-0

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding,first coupled with 2-Hydroxybenzoic acid, and then in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid coupling, its product to diazo, and Benzene-1,3-diamine coupling.

Properties and Applications: brown olive green light.

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