- Direct Black 19
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- $0.00 / 25kg
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2025-12-03
- CAS:6428-31-5
- Min. Order: 25kg
- Purity: 1
- Supply Ability: 5mt
- Direct Black 19
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- $1.00 / 1KG
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2019-12-24
- CAS:6428-31-5
- Min. Order: 1KG
- Purity: 98%HPLC
- Supply Ability: 10t
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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 |
| Boiling point | 1379℃[at 101 325 Pa] | | density | 1.49[at 20℃] | | vapor pressure | 0Pa at 25℃ | | Water Solubility | 22.67g/L at 20℃ | | InChIKey | BRZPIOXDFJITBK-FVFGOVLKSA-N | | SMILES | NC1=C(C(S(O)(=O)=O)=CC2=CC(S(O)(=O)=O)=C(/N=N/C3C=CC(/N=N/C4C=CC(N)=CC=4N)=CC=3)C(O)=C12)/N=N/C1C=CC(/N=N/C2C=CC(N)=CC=2N)=CC=1.[NaH] | | 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) |
| | 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.
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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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