C.I. Direct Brown 166 Usage And Synthesis

Preparation

N-(3-aminophenyl)formamide diazo, first in alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid?coupling, hydrolysis amino acylation, product to double nitriding, and 0.8 Moore 2-(3-Aminophenylamino)acetic acid and 0.2 Moore 2,4-Diaminobenzenesulfonic acid (2 Moore) coupled.

Properties and Applications

brown to red light brown. The strong sulfuric acid for dark purple red to date, diluted red for brown. The dye solution to join strong hydrochloric acid with chocolate brown precipitation; Add thick sodium hydroxide solution for purplish red color

C.I. Direct Brown 166(8005-89-8)Related Product Information

• [1,1'-Biphenyl]-3,3'-dicarboxylic acid, 4-[[4,5-dihydro-3-methyl-5-oxo-1-(6-sulfo-2-naphthalenyl)-1H-pyrazol-4-yl]azo]-4'-[[1-[[(2-methoxyphenyl)amino]carbonyl]-2-oxopropyl]azo]-, trisodium salt
• 4-Amino-2-[(2,4-diaminophenyl)azo]-5-[[3-[(2,4-diaminophenyl)azo]phenyl]azo]benzenesulfonic acid sodium salt
• Direct Brown 159
• Direct Brown 161
• [1,1'-Biphenyl]-3,3'-dicarboxylic acid, 4-[(6-carboxy-1,7-dihydroxy-3-sulfo-2-naphthalenyl)azo]-4'-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-, tetrasodium salt
• 4-Amino-5-hydroxy-3-[[4'-[(2,4-diaminophenyl)azo]-1,1'-biphenyl-4-yl]azo]naphthalene-2,7-disulfonic acid disodium salt
• 3,5-Diamino-4-chloro-2-[[4'-[[2,6-diamino-3-methyl-5-[(4-sulfophenyl)azo]phenyl]azo]-1,1'-biphenyl-4-yl]azo]benzenesulfonic acid disodium salt
• Direct Brown 171
• disodium 5-[[4'-[[2,6-diamino-3-methyl-5-[(4-sulphonatophenyl)azo]phenyl]azo][1,1'-biphenyl]-4-yl]azo]-3-methylsalicylate