2278-50-4
Vat Black 8
CAS: 2278-50-4
Molecular Formula: C45H19N3O4
2278-50-4 - Names and Identifiers
| Name | Vat Black 8 |
| Synonyms | Grey M Vat Grey M C.I. 71000 Vat Black 8 Novatic Grey M C.I. Vat Black 8 Mikethrene Grey M Dycosthren Grey M Indanthren Grey M Hibeithrene Grey M Nihonthrene Grey M |
| CAS | 2278-50-4 |
| EINECS | 218-906-1 |
| InChI | InChI=1/C45H19N3O4/c49-42-24-6-2-1-5-22(24)40-37-29(42)13-10-23-21-9-12-28-33-19(16-18-32(35(21)33)48(47-40)41(23)37)20-15-17-31-34(36(20)45(28)52)27-11-14-30-38(39(27)46-31)44(51)26-8-4-3-7-25(26)43(30)50/h1-18,46H |
2278-50-4 - Physico-chemical Properties
| Molecular Formula | C45H19N3O4 |
| Molar Mass | 665.66 |
| Density | 1.2394 (rough estimate) |
| Boling Point | 685.55°C (rough estimate) |
| Refractive Index | 1.7790 (estimate) |
| Physical and Chemical Properties | Black powder. Insoluble in water, acetone, ethanol, chloroform, toluene, O-chlorophenol-soluble, pyridine. In concentrated sulfuric acid, it is yellow-green, and the black precipitate is produced after dilution. In the alkaline solution of sodium hydrosulfite was blue green, in the acidic liquid red light brown. |
2278-50-4 - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | reduced ash m is mainly used for dyeing cotton fiber and printing cotton cloth, with good affinity and general levelness. It is also used to dye silk, viscose fiber and vitamin cotton. reduced black 8 is mainly used for dyeing and printing of cotton fibers and their textiles. It can also be used for dyeing viscose, silk, vitamin cotton blended fabrics, etc. The dyeing method can adopt roll and dip dyeing, and its fine powder specifications are suitable for suspension pad dyeing. After finishing with cyanaldehyde and BHES resin, the color light is basically unchanged. After finishing with trimethyltrimethylmethylol melamine or DMEU resin, the color light is blue compared with the original. After finishing with 2D resin, the color light turns slightly red. |
| production method | benzanthrone is brominated with bromine, sulfuric acid, and chlorosulfonic acid to obtain dibromobenzanthrone. The pyrazole anthrone was prepared by diazotization of 1-amino anthraquinone, reduction with sodium sulfite and sodium hydroxide, and then closed-loop with sulfuric acid. Then, under the action of potassium carbonate and cuprous chloride, dibromobenzenolone and pyrazole anthrone are condensed for the first time, and then condensed with 1-aminoanthraquinone for the second time, and then in The closed loop is realized in the presence of ethanol and potassium hydroxide, and then neutralized with hydrochloric acid, filtered and commercialized to produce the product. Raw material consumption (kg/t) benzoin anthrone (100%) 2001-aminoanthraquinone (100%) 400 bromine 260 sulfuric acid (100%) 3200 caustic soda (100%) 130 potassium hydroxide (100%) 810 potassium carbonate 210 cuprous chloride 25 ethanol 400 sodium nitrite 80 sodium bisulfite 340 sodium hypochlorite (10%) 950 industrial salt 730 pulling powder 10 diffuser (100%) 640 vat dye is a chemical substance that is difficult to manufacture and has a complex structure. Different chemical structures affect the solubility, overreduction and peroxidation stability, quality and molecular weight of sodium folinic acid, the diffusivity of the fabric in and out of the fiber, and the final performance of dyeing. Using benzoin anthrone and 1-aminoanthraquinone as raw materials, the benzoin anthrone is first brominated to obtain dibromoanthrone (I), and then 1-aminoanthraquinone is diazotized, reduced and closed-loop to obtain pyrazole anthrone (II); then (I) and (II) are condensed for the first time, and then condensed with 1-aminoanthraquinone for the second time, and the product is obtained in a closed loop under alkaline conditions. The finished product is obtained by neutralization, filtration, mixing with additives and drying.. |
Last Update：2024-04-09 15:16:45
