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| OEM | OEM Services Provided |
| Feature | Good stability,Easy to Use |
| Classification | Dyes and Pigments |
| Advantage | Professional, Fast Delivery, Customizable | Samples | Apply for free，Contact us now. |
| 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 |
| 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) |
| Hazardous Substances Data | 6428-31-5(Hazardous Substances Data) |
| 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. | ||||||||||||||||||||||||||||
| 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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| 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 |
Declaration: The products displayed on this website are intended exclusively for industrial applications or scientific research. They are not intended for medical, pharmaceutical, or food use. In accordance with applicable laws and regulations, purchasing organizations must hold valid qualifications and approvals.
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