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Physiochemical features of the RB 250 dye.
| Dye | Reactive blue 250 |
|---|---|
| CAS No. | 93951-21-4 |
| Mol. formula | C27H23N5Na4O20S6 |
| Mol. mass | 1020.89 |
| Chemical nature | Anionic blue 250 |
| Chromophore group | Azo group |
| Color index name | Reactive Blue 250 |
| λmax(nm) | 604 |
| Reactive group | Vinyl sulfone group |
