| Chemical Name. | Reactive Red 21 |
| C.I. No. | – |
| CAS No. | 11099-79-9 |
| Synonyms. | Reactive brilliant Red KN-2B,Reactive Red RB |
| Molecular Formula | C26H19N4Na3O15S4 |
| Molecular Weight | 824.68 |
| Chemical Name. | Reactive Red 21 |
| C.I. No. | – |
| CAS No. | 11099-79-9 |
| Synonyms. | Reactive brilliant Red KN-2B,Reactive Red RB |
| Molecular Formula | C26H19N4Na3O15S4 |
| Molecular Weight | 824.68 |