6-Amino-3-[[4'-[[2,6-diamino-3-methyl-5-[(4-sulfophenyl)azo]phenyl]azo]-1,1'-biphenyl-4-yl]azo]-4-hydroxy-2-naphthalenesulfonic acid disodium salt Chemical Properties

EPA Substance Registry System

C.I. Direct Brown 68 (6449-85-0)

6-Amino-3-[[4'-[[2,6-diamino-3-methyl-5-[(4-sulfophenyl)azo]phenyl]azo]-1,1'-biphenyl-4-yl]azo]-4-hydroxy-2-naphthalenesulfonic acid disodium salt Usage And Synthesis

Preparation

4-(4-Aminophenyl)benzenamine double nitriding, first and (in bicarbonate media) 6-Amino-4-hydroxynaphthalene-2-sulfonic acid?coupling, and then and 4-Aminobenzenesulfonic acid diazo, and 4-Methylbenzene-1,3-diamine coupled to a product matches.

Properties and Applications

red light brown. Soluble in water for red light brown. In the dark for the strong sulfuric acid, diluted to red orange brown. The dye solution to join strong hydrochloric acid have red light brown precipitation; Add thick sodium hydroxide solution for red light orange brown.

6-Amino-3-[[4'-[[2,6-diamino-3-methyl-5-[(4-sulfophenyl)azo]phenyl]azo]-1,1'-biphenyl-4-yl]azo]-4-hydroxy-2-naphthalenesulfonic acid disodium salt(6449-85-0)Related Product Information

• Direct Brown 7
• C.I. Direct brown 75
• DIRECT BROWN 74
• Direct Brown 69
• Direct Brown 73
• C.I. Direct Brown 67
• Direct Brown 78
• Direct Brown 70
• 4,4'-[(2-Methyl-5-sodiosulfo-1,3-phenylene)bis[azo(4,6-diamino-3,1-phenylene)azo]]bis[naphthalene-1-sulfonic acid sodium] salt