ChemicalBook--->CAS DataBase List--->6428-31-5

6428-31-5

6428-31-5 Structure

6428-31-5 Structure
IdentificationMore
[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
Chemical PropertiesBack Directory
[Boiling point ]

1379℃[at 101 325 Pa]
[density ]

1.49[at 20℃]
[vapor pressure ]

0Pa at 25℃
[Water Solubility ]

22.67g/L at 20℃
[LogP]

-1.5 at 20℃
[CAS DataBase Reference]

6428-31-5(CAS DataBase Reference)
[EPA Substance Registry System]

C.I. Direct Black 19, disodium salt (6428-31-5)
Raw materials And Preparation ProductsBack Directory
[Raw materials]

Sodium carbonate-->Sodium nitrite-->Sodium sulfide-->4-Nitroaniline-->m-Phenylenediamine-->8-Amino-1-naphthol-3,6-disulfonic acid monosodium salt monohydrate-->m-Phenylenediamine-->4-Nitroaniline
Safety DataBack Directory
[Hazardous Substances Data]

6428-31-5(Hazardous Substances Data)
Hazard InformationBack 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.
Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 4 3 3-4 2 2
AATCC 4-5 3 3 2-3 2
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