dye|World dye variety

Name:C.I.Direct Brown 20,C.I.30060

Molecular Structure: trisazo class

C.I.Direct Brown 20,C.I.30060,746.66,C35H24N8Na2O7S,Diazol Brown FBR

Molecular Formula:C₃₅H₂₄N₈Na₂O₇S

Molecular Weight: 746.66

CAS Registry Number:

Manufacturing Methods :  4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, and then and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid   diazo, and Benzene-1,3-diamine coupled to a product matches.

Properties and Applications:  brown. Soluble in water for red light brown. The strong sulfuric acid for red light blue, for yellow brown after diluted. The dye solution to join strong hydrochloric acid have dark brown precipitation; With strong sodium hydroxide solution for yellow brown, then a red light brown precipitation.

List of Suppliers:

Diazol Brown FBR( Francolor Pigments SA )