| Chemical Name | Direct Black 56 |
| C.I. No. | 34170 |
| CAS No. | 8003-57-4 |
| Synonyms | Direct Grey RLN, Direct Fast Grey RLN, Solar Grey 2R |
| Molecular Formula | C36H22N7Na3O10S3 |
| Molecular Weight | 877.77 |
| Chemical Name | Direct Black 56 |
| C.I. No. | 34170 |
| CAS No. | 8003-57-4 |
| Synonyms | Direct Grey RLN, Direct Fast Grey RLN, Solar Grey 2R |
| Molecular Formula | C36H22N7Na3O10S3 |
| Molecular Weight | 877.77 |