| Molecular Formula | C29H15ClN7O16S5.5Na |
| Physical and Chemical Properties | Chemical properties orange brown powder. The solubility in water is 70g/L (50 ℃). The aqueous solution is red. It is purplish red in concentrated sulfuric acid and orange after dilution. It is big red in concentrated nitric acid, and it is still big red after dilution. |
| Use | Uses reactive brilliant orange K-7R is suitable for dyeing cotton and viscose fiber, all kinds of dyeing methods can be used, and the dyeing rate is high. It is also used for direct and anti-dyeing printing of cotton and viscose fabrics. Discharge printing is only applicable to light ground colors. This product is bright, high purity, red light orange in the better varieties. Often combined with reactive brilliant red K-2BP to dye a variety of bright red, can also be used for silk, woven fabric direct printing for cotton, viscose and other fabrics printing |
Using 2-naphthylamine -4,6, 8-trisulfonic acid, J acid, m-aminobenzenesulfonic acid, and cyanuric chloride as raw materials, first the cyanuric chloride is condensed with J acid, and then 2-naphthylamine -4,6, 8-trisulfonic acid is diazotized, coupled with the aforementioned condensate, and finally with m-aminobenz. The finished product is salted out, filtered and dried.