| Molecular Formula | C64H40N16O26S8.8Na |
| Physical and Chemical Properties | Chemical properties red powder. Soluble in water. Excellent high temperature resistance. |
| Use | Direct-blended brilliant red D-5BL is suitable for one-bath and one-step dyeing of polyester-cotton and polyester-viscose blended fabrics. |
using aniline, h acid, cyanuric chloride, p-aminobenzenesulfonic acid and DSD acid as raw materials, DSD acid and cyanuric chloride are first condensed, then aniline is diazotized, and H acid is coupled for the second condensation, and finally the product is obtained by the third condensation with p-aminobenzenesulfonic acid.