2,7-Naphthalenedisulfonic acid, 5-amino-3-[[4-[[4-[[4-[[4-[(8-amino-1-hydroxy-3,6-disulfo-2-naphthalenyl)azo]-6(or 7)-sulfo-1-naphthalenyl]azo]phenyl]amino]-3-sulfophenyl]azo]-6(or 7)-sulfo-1-naphthalenyl]azo]-4-hydroxy-, heptasodium salt Usage And Synthesis

Preparation

5-Amino-2-(4-aminophenylamino)benzenesulfonic acid double nitriding, and 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid (2 Moore) coupled, then double nitriding, in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid(2 Moore) coupled.

Properties and Applications

Green light blue. Soluble in water for green light blue, slightly soluble in ethanol and soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid in dark green light for blue, red for navy solution diluted. The dye solution to join 10% sodium hydroxide solution for shallow dark red light blue.

2,7-Naphthalenedisulfonic acid, 5-amino-3-[[4-[[4-[[4-[[4-[(8-amino-1-hydroxy-3,6-disulfo-2-naphthalenyl)azo]-6(or 7)-sulfo-1-naphthalenyl]azo]phenyl]amino]-3-sulfophenyl]azo]-6(or 7)-sulfo-1-naphthalenyl]azo]-4-hydroxy-, heptasodium salt(8018-14-2)Related Product Information

• disodium 3-[[4'-[[6-amino-1-hydroxy-3-sulphonato-2-naphthyl]azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-1-sulphonate
• 6'-Amino-1'-hydroxy-4-[[4-[(3-sodiosulfophenyl)azo]-1-naphthalenyl]azo][1,2'-azobisnaphthalene]-3',7-disulfonic acid disodium salt
• Direct Blue 183
• C.I. Direct Blue 184
• C.I. Direct Blue 185
• Direct Blue 167
• DIRECT BLUE 189
• C.I. Direct Blue, heptasodium salt
• 4-Amino-5-hydroxy-6-[[4'-[(1-hydroxy-6-phenylamino-3-sodiosulfo-2-naphthalenyl)azo]-1,1'-biphenyl-4-yl]azo]naphthalene-1,3-disulfonic acid disodium salt