dye|World dye variety

Name:C.I.Direct Brown 159,C.I.31755

Molecular Structure: trisazo class

C.I.Direct Brown 159,C.I.31755,850.68,C35H21N6Na3O12S2,Paradiazol Bronze J

Molecular Formula:C₃₅H₂₁N₆Na₃O₁₂S₂

Molecular Weight: 850.68

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 acid coupling, product diazo again, and Resorcinol coupling.

Properties and Applications: brown olive green light. Soluble in water for brown. The strong sulfuric acid is palm in light purple, diluted for Shallow red time The dye solution to join strong hydrochloric acid with brown precipitation; Add thick sodium hydroxide solution for brown.

List of Suppliers:

Paradiazol Bronze J( Francolor Pigments SA )