dye|World dye variety

Name:C.I.Direct Brown 75,C.I.30325

Molecular Structure: trisazo class

C.I.Direct Brown 75,C.I.30325,CAS 1324-84-1,883.75,C39H24N7Na3O10S2

Molecular Formula:C₃₉H₂₄N₇Na₃O₁₀S₂

Molecular Weight: 883.75

CAS Registry Number:1324-84-1

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, and 2-Hydroxybenzoic acid coupling, and then and Naphthalen-1-amine diazo, Coupled with 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid  coupling product obtained.

Properties and Applications: dark red light brown. The strong sulfuric acid for red light blue, purple solution for red after diluted, precipitation; In the nitric acid for brown. The dye solution to join strong hydrochloric acid have dark purple precipitation; Add thick sodium hydroxide solution is palm red light.

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