| Name | Acid Red 215 |
| Synonyms | Lanyl Red B Acid Red 215 NEUTER RED BL Lanasyn Red BL C.I.Acid Red 215 Dyneutral Red BL |
| CAS | 12239-06-4 |
| Molecular Formula | C16H14N6O6S |
| Molar Mass | 418.38 |
| Physical and Chemical Properties | Chemical properties jujube red to purplish red powder. It is golden yellow in concentrated sulfuric acid and turns to orange after dilution. It is red in concentrated nitric acid, and the color remains unchanged after dilution. There is no change in concentrated hydrochloric acid, and it is red after dilution. There is no change in concentrated sodium hydroxide, and it is blue-red after dilution, with precipitation. The aqueous solution is red in sauce. |
| Use | Uses neutral pink BL is mainly used for dyeing wool, silk, PVA, nylon in weak acid or neutral dyeing bath, and direct printing of wool, silk, nylon fabric. When used for wool and a variety of fibers with the bath dyeing, nylon color is darker, silk slightly shallow, more shallow vinylon, acetate fiber and cotton slightly stained, viscose fiber does not stain. Also used for the dyeing of leather. For wool, silk, tussah silk, nylon, Vinylon and Wei/cotton blended fabric dyeing |
Using 2-amino -5-nitrophenol and 1-(m-sulfonyl aminophenyl)-3-methyl -5-pyrazolone as raw materials, the former is first diazotized and then coupled with the latter. Finally, it is complexed with chromium salicylate, filtered and dried to obtain the finished product.