| Molecular Formula | C60H46N16O22S6.6Na |
| Physical and Chemical Properties | EPA Chemical Information C. I. Direct Red 227 (12222-51-4) |
| Use | Use direct resistance to red FR for cotton, viscose fiber, silk dyeing and printing of fabric, bright blue red. It is also suitable for one-bath one-step dyeing of polyester-cotton and polyester-viscose blended fabrics. The dyeing fastness was excellent. |
| Raw Materials | 4,4-Diamino-2,2-stilbenedisulfonic acid |
aniline, h acid, DSD acid, cyanuric chloride and morpholine are used as raw materials. First, aniline diazotization is coupled with H acid, then the coupling product is condensed with cyanuric chloride for the first time, then condensed with DSD acid for the second time, and finally condensed with morpholine for the third time to obtain the product. The finished product is salted out, filtered and dried.