| Chemical Name | Acid Blue 277 |
| C.I. No. | 61203 |
| CAS No. | 25797-81-3 |
| Synonyms | Weak Acid Brilliant Blue 4R, Acid Blue E4R, Acid Blue 4R 200%,Best Acid Brilliant Blue 4R, Brilliant Alizarine Milling BLue FBL, Chromalon Blue 4RKWL 200%,Lerui Acid Blue E-4R, Nylosan Blue E-4R, PermalonBlue4RS 100%,Phoebe Blue W-4R 200%, Rimacid Blue 4R 200%, Taitilon Blue 4R-T 200%, Tectilon Blue 4R, Tectilon Blue 4RS KWL 100%,Triacid Fast Blue 4RL, Acid Blue S-4R, Best Acid Brilliant Blue 4R |
| Molecular Formula | C24H22N3NaO8S2 |
| Molecular Weight | 567.57 |
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