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| | Direct Black 19 Basic information |
| Product Name: | Direct Black 19 | | Synonyms: | Direct black RN;disodium 4-amino-3,6-bis[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-5-hydroxynaphthalene-2,7-disulphonate;Black G;Atul Direct Black VG;Benzo Fast Black G;Condires Black AN;Kayarus Black G;Sumilight Black G | | CAS: | 6428-31-5 | | MF: | C34H30N13NaO7S2 | | MW: | 819.81 | | EINECS: | 229-208-1 | | Product Categories: | Organics;Dyes and Pigments | | Mol File: | 6428-31-5.mol |  |
| | Direct Black 19 Chemical Properties |
| | 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 | 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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| | Direct Black 19 Preparation Products And Raw materials |
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