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2-Hydroxy-5-[[4'-[[4-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-1-naphtyl]azo]-1,1'-biphenyl-4-yl]azo]benzoic acid disodium salt

Basic information Safety Supplier Related

2-Hydroxy-5-[[4'-[[4-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-1-naphtyl]azo]-1,1'-biphenyl-4-yl]azo]benzoic acid disodium salt Basic information

Product Name:
2-Hydroxy-5-[[4'-[[4-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-1-naphtyl]azo]-1,1'-biphenyl-4-yl]azo]benzoic acid disodium salt
Synonyms:
  • 2-Hydroxy-5-[[4'-[[4-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-1-naphtyl]azo]-1,1'-biphenyl-4-yl]azo]benzoic acid disodium salt
  • Benzo Grey S
  • C.I.31760
  • C.I.Direct Black 40
  • Benzoic acid, 2-hydroxy-5-((4'-((4-((1-hydroxy-4-sulfo-2-naphthalenyl)azo)-1-naphthalenyl)azo)(1,1'-biphenyl)-4-yl)azo)-, disodium salt
  • C.I.Direct Black 40:C.I.31760
  • Direct Black 40
CAS:
6449-81-6
MF:
C39H24N6Na2O7S
MW:
766.6884
Mol File:
6449-81-6.mol
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2-Hydroxy-5-[[4'-[[4-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-1-naphtyl]azo]-1,1'-biphenyl-4-yl]azo]benzoic acid disodium salt Chemical Properties

EPA Substance Registry System
C.I. Direct Black 40 (6449-81-6)
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2-Hydroxy-5-[[4'-[[4-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-1-naphtyl]azo]-1,1'-biphenyl-4-yl]azo]benzoic acid disodium salt Usage And Synthesis

Preparation

4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, again with Naphthalen-1-amine coupling, product to diazo, and 4-Hydroxynaphthalene-1-sulfonic acid coupling.

Properties and Applications

Grey

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

2-Hydroxy-5-[[4'-[[4-[(1-hydroxy-4-sulfo-2-naphtyl)azo]-1-naphtyl]azo]-1,1'-biphenyl-4-yl]azo]benzoic acid disodium saltSupplier