C.I. Direct brown 62 Chemical Properties

EPA Substance Registry System

C.I. Direct Brown 62 (8003-56-3)

C.I. Direct brown 62 Usage And Synthesis

Preparation

4-(4-Aminophenyl)benzenamine double nitriding,first coupled with 2-Hydroxybenzoic acid, then with 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid coupling, its product to diazo, and 2,4-Diamino-5-methylbenzenesulfonic acid coupling.

Properties and Applications

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

C.I. Direct brown 62(8003-56-3)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
• Benzoic acid, 5-[[4'-[(2-amino-3-hydroxy-6-sulfo-1-naphthalenyl)azo][1,1'-biphenyl]-4-yl]azo]-2-hydroxy-, disodium salt
• [2,6'-Bibenzothiazole]-7-sulfonic acid, 2'-[4-[(2,4-diamino-5-methylphenyl)azo]phenyl]-6-methyl-, monosodium salt