2-Hydroxy-5-[[4'-[(2-hydroxy-3,6-disulfo-1-naphtyl)azo]-1,1'-biphenyl-4-yl]azo]benzoic acid trisodium salt

Product Name
2-Hydroxy-5-[[4'-[(2-hydroxy-3,6-disulfo-1-naphtyl)azo]-1,1'-biphenyl-4-yl]azo]benzoic acid trisodium salt
CAS No.
6548-26-1
Chemical Name
2-Hydroxy-5-[[4'-[(2-hydroxy-3,6-disulfo-1-naphtyl)azo]-1,1'-biphenyl-4-yl]azo]benzoic acid trisodium salt
Synonyms
C.I.22280;Direct Red 18;C.I.Direct Red 18;C.I.Direct Red 18:C.I.22280;2-Hydroxy-5-[[4'-[(2-hydroxy-3,6-disulfo-1-naphtyl)azo]-1,1'-biphenyl-4-yl]azo]benzoic acid trisodium salt;Benzoic acid, 2-hydroxy-5-((4'-((2-hydroxy-3,6-disulfo-1-naphthalenyl)azo)(1,1'-biphenyl)-4-yl)azo)-, trisodium salt
CBNumber
CB32244731
Molecular Formula
C29H20N4O10S2.3Na
Formula Weight
717.6
MOL File
6548-26-1.mol
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2-Hydroxy-5-[[4'-[(2-hydroxy-3,6-disulfo-1-naphtyl)azo]-1,1'-biphenyl-4-yl]azo]benzoic acid trisodium salt Property

EPA Substance Registry System
C.I. Direct Red 18 (6548-26-1)
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Hazard and Precautionary Statements (GHS)

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2-Hydroxy-5-[[4'-[(2-hydroxy-3,6-disulfo-1-naphtyl)azo]-1,1'-biphenyl-4-yl]azo]benzoic acid trisodium salt Chemical Properties,Usage,Production

Preparation

4-(4-Aminophenyl)benzenamine double nitriding, first with 2-Hydroxybenzoic acid coupling, again with 3-Hydroxynaphthalene-2,7-disulfonic acid coupling.

Properties and Applications

red red to blue light. Slightly soluble in water for pink, soluble in ethanol, insoluble in other organic solvents. The strong sulfuric acid to red light purple, orange for diluted. The dye solution with strong hydrochloric acid is palm red light, precipitation; Add thick sodium hydroxide solution have yellow precipitation.

Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 4 4-5 1-2 2-3 3

2-Hydroxy-5-[[4'-[(2-hydroxy-3,6-disulfo-1-naphtyl)azo]-1,1'-biphenyl-4-yl]azo]benzoic acid trisodium salt Preparation Products And Raw materials

Raw materials

Preparation Products

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2-Hydroxy-5-[[4'-[(2-hydroxy-3,6-disulfo-1-naphtyl)azo]-1,1'-biphenyl-4-yl]azo]benzoic acid trisodium salt Suppliers

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6548-26-1, 2-Hydroxy-5-[[4'-[(2-hydroxy-3,6-disulfo-1-naphtyl)azo]-1,1'-biphenyl-4-yl]azo]benzoic acid trisodium saltRelated Search:

Chloramine Rubine C.I. Direct Red 169, disodium salt DIRECT RED 16 [4-Chloro-2-[[1-hydroxy-6-[[4-[(8-hydroxy-5-quinolinyl)azo]benzoyl]amino]-3-sulfo-2-naphtyl]azo]phenoxy]acetic acid Benzoic acid, 5-[[4-[[4-[[6-[(4-aminobenzoyl)amino]-1-hydroxy-3-sulfo-2-naphthalenyl]azo]benzoyl]amino]phenyl]azo]-2-hydroxy-, disodium salt Naphtho[2,1-d]thiazole-8-sulfonic acid, 2-(3-aminophenyl)-7-[(2,4-dimethylphenyl)azo]-6-hydroxy-, monosodium salt 7,7'-(Carbonyldiimino)bis[4-hydroxy-3-[(2-hydroxy-5-nitrophenyl)azo]-2-naphthalenesulfonic acid]disodium salt Direct Red 173 disodium 5-[[4-[[[4-[[6-[(4-aminobenzoyl)amino]-1-hydroxy-3-sulphonato-2-naphthyl]azo]phenyl]amino]carbonyl]phenyl]azo]salicylate

  • 2-Hydroxy-5-[[4'-[(2-hydroxy-3,6-disulfo-1-naphtyl)azo]-1,1'-biphenyl-4-yl]azo]benzoic acid trisodium salt
  • C.I.22280
  • C.I.Direct Red 18
  • Benzoic acid, 2-hydroxy-5-((4'-((2-hydroxy-3,6-disulfo-1-naphthalenyl)azo)(1,1'-biphenyl)-4-yl)azo)-, trisodium salt
  • C.I.Direct Red 18:C.I.22280
  • Direct Red 18
  • 6548-26-1