Benzoic acid, 5-[[4'-[(2-amino-3-hydroxy-6-sulfo-1-naphthalenyl)azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxy-, disodium salt Chemical Properties

EPA Substance Registry System

C.I. Direct Brown 60 (6426-57-9)

Benzoic acid, 5-[[4'-[(2-amino-3-hydroxy-6-sulfo-1-naphthalenyl)azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxy-, disodium salt Usage And Synthesis

Preparation

4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, and then in acetic acid medium and 6-Amino-7-hydroxynaphthalene-2-sulfonic acid?coupling.

Properties and Applications

yellow light brown. Moderate soluble in water for yellow brown, slightly soluble in ethanol is palm light yellow to olive. The strong sulfuric acid for blue-ray in black, yellow light brown for diluted. The dye solution to join strong hydrochloric acid for olive brown, have precipitation; Add thick sodium hydroxide solution for orange brown.

Benzoic acid, 5-[[4'-[(2-amino-3-hydroxy-6-sulfo-1-naphthalenyl)azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxy-, disodium salt(6426-57-9)Related Product Information

• Direct Brown 57
• 6-Amino-4-hydroxy-3-[[4'-[(2,4-diaminophenyl)azo]-1,1'-biphenyl-4-yl]azo]naphthalene-2-sulfonic acid sodium salt
• disodium 5-[[4'-[[4-[(4-hydroxyphenyl)azo]-6(or 7)-sulphonato-1-naphthyl]azo][1,1'-biphenyl]-4-yl]azo]salicylate
• DIRECT BROWN 6
• Benzoic acid, 5-[[4'-[[7-(dimethylamino)-1-hydroxy-3-sulfo-2-naphthalenyl]azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxy-, disodium salt
• DIRECT BROWN 59
• Direct Brown 61
• [2,6'-Bibenzothiazole]-7-sulfonic acid, 2'-[4-[(2,4-diamino-5-methylphenyl)azo]phenyl]-6-methyl-, monosodium salt
• C.I. Direct brown 62