| Name | Reactive Black M-2R |
| Synonyms | Reactive Black M-2R |
| Molecular Formula | C27H16ClN8O16S4.1/2Cr.3Na |
| Physical and Chemical Properties | Chemical properties black powder. The solubility in water (50 ℃) is 60g/L. The aqueous solution is red and black, and the 1mol/L sodium hydroxide solution is green and black. After adding sodium sulfite and warming, it is yellow, and sodium perborate is still yellow. It is navy blue in concentrated sulfuric acid, and it is still navy blue after dilution. It is navy blue in concentrated nitric acid, and it is still navy blue after dilution. |
| Use | Use 1, active black M-2R for dyeing cotton, viscose fiber, suitable for all kinds of dyeing method, more appropriate for pad dyeing. It is also used for direct and anti-dyeing printing of cotton and viscose fiber fabrics. It can also be used for Vinylon dyeing, dyeing/cotton fabric, the color is lighter, when the deep dye has silver wire clip flower phenomenon. 2, for cotton, viscose and other fabric printing and pad dyeing. |
using h acid, 2-amino -4-nitrophenol, cyanuric chloride and p (2-sulfate ethyl sulfone group) aniline as raw materials, the 2-amino -4-nitrophenol is first diazotized, coupled with h acid and then complexed with chromium, then condensed with cyanuric chloride for the first time, and then condensed with p (2-sulfate ethyl sulfone group) aniline for the second time to obtain the product. The finished product is salted out, filtered and dried.
| use | reactive black M-2R is used for dyeing cotton and viscose fibers, suitable for various dyeing methods, and more suitable for pad dyeing. It is also used for direct and anti-dyeing printing of cotton and viscose fiber fabrics. It can also be used for vinylon dyeing. When dyeing vitamin/cotton fabrics, the vitamin color is lighter, and when dyeing deep, there is a phenomenon of silver filaments. for printing and pad dyeing of cotton, viscose and other fabrics |
| Production method | Using H acid, 2-amino -4-nitrophenol, cyanuric chloride and p (2-sulfate ethyl sulfone group) Aniline as raw materials, first 2-amino -4-nitrophenol is diazotized, coupled with H acid and then subjected to chromium complexation, and cyanuric chloride for the first condensation, then it is condensed with p-(2-sulfate ethyl sulfone group) aniline for the second time to obtain the product. The finished product is salted out, filtered and dried.. |