| Chemical Name | Reactive Blue 81 |
| C.I. No. | 18245 |
| CAS No. | 75030-18-1 |
| Synonyms | Acticrom Brilliant Blue F2R, Begative Blue CD-2R, Helaktyn Blue F-2R, Jakofix Brilliant Blue C4R, Kemaion Blue M2R, Libactive Reactive Blue M2R, Polkative Blue PX-2R, Vilmafix Blue 2R-A |
| Molecular Formula | C25H14Cl2N7Na3O10S3 |
| Molecular Weight | 808.49 |
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