| Molecular Formula | C16H13N3O4S |
| Molar Mass | 343.35 |
| Physical and Chemical Properties | Brown-red powder. In concentrated sulfuric acid was purple red, resulting in purple precipitation after dilution. In concentrated nitric acid is destroyed, brown liquid, diluted to produce more precipitation. No change in concentrated hydrochloric acid. No change in concentrated sodium hydroxide, diluted red solution. Its aqueous solution is colored red in sauce. |
| Use | neutral jujube grl is mainly used for dyeing wool, silk, nylon, vinylon in neutral or weak acid dyeing bath, and wool, direct printing of silk and nylon fabrics. When it is used for dyeing wool with other fibers in the same bath, nylon is dark in color, silk is slightly light in color, diacetate fiber is stained in color, and cotton and viscose fibers are stained in color. |
| production method | 2-aminophenol -4-sulfonamide and 2-Naphthol as raw materials, first, 2-aminophenol -4-sulfonamide was diazotized, coupled with 2-naphthol, then complexed with cobalt chloride, filtered and dried to give a finished product.. |