C.I. Direct Blue, heptasodium salt Usage And Synthesis

Preparation

5-Amino-2-(4-aminophenylamino)benzenesulfonic acid double nitriding, in alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid? (2 Moore) coupled, then double nitriding, and 4-Amino-5-hydroxynaphthalene-1,3-disulfonic acid (2 Moore) coupled:

Properties and Applications

navy blue. Soluble in water for dark red light blue, insoluble in organic solvents. The strong sulfuric acid for blue-ray gray, diluted dark purple solution for blue-ray, and accompanied by precipitation; In 10% of sulfuric acid for shallow dark. The dye solution to join 10% sodium hydroxide solution for shallow dark.

C.I. Direct Blue, heptasodium salt(6428-41-7)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
• 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
• C.I. Direct Blue 184
• C.I. Direct Blue 185
• Direct Blue 167
• DIRECT BLUE 189
• 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