| Identification | More | [Name]
Direct Black 19 | [CAS]
6428-31-5 | [Synonyms]
disodium 4-amino-3,6-bis[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-5-hydroxynaphthalene-2,7-disulphonate
2,7-Naphthalenedisulfonic acid, 4-amino-3,6-bis4-(2,4-diaminophenyl)azophenylazo-5-hydroxy-, disodium salt
RIFAZOLBLACKGR
Direct black 19 (C.I. 35255)
Black G
Atul Direct Black VG
Benzo Fast Black G
Condires Black AN
Kayarus Black G
Sumilight Black G
Tertrodirect Viscose Black GTN
Vicorect Black FB.
1-Hydroxy-8-amino-2,7-bis[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-3,6-naphthalenedisulfonic acid disodium salt
4-Amino-3,6-bis[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-5-hydroxynaphthalene-2,7-disulfonic acid disodium salt
C.I.35255
Disodium 4-amino-3,6-bis[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-5-hydroxynaphthalene-2,7-disulphonate | [EINECS(EC#)]
229-208-1 | [Molecular Formula]
C34H27N13Na2O7S2 | [MDL Number]
MFCD00137529 | [Molecular Weight]
839.771 | [MOL File]
6428-31-5.mol |
| Hazard Information | Back Directory | [Preparation]
4-Nitrobenzenamine (2 Moore) diazo, one in acid conditions, a in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid (1 Moore) coupling, and then will the nitro reduction, diazotization, again with Benzene-1,3-diamine (2 Moore) coupled. | [Flammability and Explosibility]
Nonflammable | [Properties and Applications]
green and black. Black powder. Soluble in water for green light black, solubility of 100 g/L (80 ℃), slightly soluble in ethanol and acetone. The strong sulfuric acid in the green light for black, dilute red after black precipitation; In nitric acid to dark brown. Dyes and microstructure of sulfuric acid solution 10% red; Add thick sodium hydroxide solution for green light blue. Copper ions in dyeing color shade the green, iron ion a slight change in color. Used in viscose of dyeing and printing. In the cotton knitwear, blankets, flannelette, silk, viscose, silk that the fabric, wool/viscose fiber blend fabrics can be used. Can also be used in leather, paper and electrochemical aluminum color.
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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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3
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3-4
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2
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2
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AATCC
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4-5
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3
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3
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2-3
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2
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