Direct Black 19 Chemical Properties

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)

Safety Information

Hazardous Substances Data

6428-31-5(Hazardous Substances Data)

Direct Black 19 Usage And Synthesis

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

Non flammable

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.

Direct Black 19(6428-31-5)Related Product Information

• DIRECT RED 80
• Direct Black 168
• Direct Orange S
• Direct Yellow 12
• Direct Black 38
• Iron Oxide Green
• DIAMINE GREEN B
• CHLORAZOL VIOLET N
• BRILLIANT YELLOW
• Direct Red 31
• DIRECT FAST BROWN M
• STILBENE YELLOW
• CI NO 22610
• Direct Red 23
• DIRECT BLUE 15
• Direct Blue 86
• Direct Black 166
• DIRECT BLACK 22