| Chemical Name | Direct Red 81 |
| C.I. No. | 28160 |
| CAS No. | 2610-11-9 |
| Synonyms | Direct Red 4B, Direct Fast Red 8B, Direct Red 5B |
| Molecular Formula | C29H19N5Na2O8S2 |
| Molecular Weight | 675.6 |
| Chemical Name | Direct Red 81 |
| C.I. No. | 28160 |
| CAS No. | 2610-11-9 |
| Synonyms | Direct Red 4B, Direct Fast Red 8B, Direct Red 5B |
| Molecular Formula | C29H19N5Na2O8S2 |
| Molecular Weight | 675.6 |