dye|World dye variety

Name:C.I.Direct Brown 70,C.I.35530

Molecular Structure: Multi-azo class

C.I.Direct Brown 70,C.I.35530,1120.92,C45H28N20Na4O14S3,Diazol Cutch BAR

Molecular Formula:C₄₅H₂₈N₂₀Na₄O₁₄S₃

Molecular Weight: 1120.92

CAS Registry Number:

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 acidcoupling, product to diazo, in alkaline conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling, its product to diazo, and Benzene-1,3-diamine coupling.

Properties and Applications: dark red light brown. Soluble in water for brown. The strong sulfuric acid for purple brown, dilute brown yellow light after precipitation. The dye solution to join strong hydrochloric acid have brown light black precipitation; Add thick sodium hydroxide solution for palm light purple.

List of Suppliers:

Diazol Cutch BAR( Francolor Pigments SA )