| Identification | Back Directory | [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 | [CAS]
6449-81-6 | [Synonyms]
C.I.31760
Benzo Grey S
Direct Black 40
C.I.Direct Black 40
C.I.Direct Black 40:C.I.31760
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
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 | [Molecular Formula]
C39H24N6Na2O7S | [MOL File]
6449-81-6.mol | [Molecular Weight]
766.688 |
| Hazard Information | Back Directory | [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
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Standard
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Acid Resistance
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Alkali Resistance
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Light Fastness
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Soaping
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Water
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Fading
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Stain
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Fading
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Stain
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ISO
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4
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4
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2
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2
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2-3
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