2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-[[4-[[6(or 7)-sulfo-4-[(3-sulfophenyl)azo]-1-naphthalenyl]azo]-1-naphthalenyl]azo]-, trisodium salt Usage And Synthesis

Preparation

3-Aminobenzenesulfonic acid diazo, and 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid?coupling, again diazo, and Naphthalen-1-amine?coupling, product to diazo, in alkaline conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications

dark blue to the navy. Soluble in water for violet black, slightly soluble in alcohol. The strong sulfuric acid for dark purple to black, diluted for purple. The dye solution to join strong hydrochloric acid have precipitation of dark; Add thick sodium hydroxide solution have dark purple precipitation.

2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-3-[[4-[[6(or 7)-sulfo-4-[(3-sulfophenyl)azo]-1-naphthalenyl]azo]-1-naphthalenyl]azo]-, trisodium salt(8003-54-1)Related Product Information

• OXAMINE BLUE B
• 4-[[4-[(4-Aminophenyl)azo]-7-sodiosulfo-1-naphthalenyl]azo]-2'-hydroxy[1,1'-azobisnaphthalene]-6,6'-disulfonic acid disodium salt
• Direct Blue 111
• DIRECT BLUE 120
• 4-[(4-Amino-2-methyl-5-methoxyphenyl)azo]-1'-hydroxy-[1,2'-azobisnaphthalene]-4',6-disulfonic acid disodium salt
• Direct Blue 120:2
• Direct blue 116 (C.I. 27980)
• trisodium 8-[[4-[(4-aminophenyl)azo]-6-sulphonatonaphthyl]azo]-5-[(2-hydroxy-6-sulphonatonaphthyl)azo]naphthalene-2-sulphonate
• 4-[(4-Amino-2-chloro-5-methoxyphenyl)azo]-2-ethoxy-2'-hydroxy-[1,1'-azobisnaphthalene]-6,6'-disulfonic acid disodium salt