4-Hydroxy-3-[[4'-[(2-hydroxy-8-sodiosulfo-1-naphthalenyl)azo]-1,1'-biphenyl-4-yl]azo]naphthalene-2,5-disulfonic acid disodium salt C??? ??, ??, ??
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4-(4-Aminophenyl)benzenamine double nitriding, first and 7-Hydroxynaphthalene-1-sulfonic acid coupling, and then and 8-Hydroxynaphthalene-1,6-disulfonic acid coupling.
Properties and Applications
bright purple. Soluble in water for red light purple jade to red, and adequate soluble in alcohol. The strong sulfuric acid for blue, pink is diluted. The dye solution to join strong hydrochloric acid for dark, precipitation; Add thick sodium hydroxide solution for wine red, have precipitation.
Standard
Acid Resistance
Alkali Resistance
Light Fastness
Soaping
Water
Fading
Stain
Fading
Stain
ISO
4
3
1
1
1
4-Hydroxy-3-[[4'-[(2-hydroxy-8-sodiosulfo-1-naphthalenyl)azo]-1,1'-biphenyl-4-yl]azo]naphthalene-2,5-disulfonic acid disodium salt ?? ?? ? ???
