| Chemical Name | Acid Orange 51 |
| C.I. No. | 26550 |
| CAS No. | 8003-88-1 |
| Synonyms | Akacid Brown N-2RL, Aminyl Brown F-5R, Best Acid Milling Brown 5R, Chenitan Brown OR, Dupont Neutral Brown RS, Erionyl Brown RXL, Fast Silk Brown R Conc 150%, Indacid Red 2B, Kayanol Milling Brown RX, Kenanthrol Brown R, Neutral Brown 2RS, Nylomine Acid Brown C-RS, Sandolan Brown N-2RL, Suminol Milling Brown 5R, Triacid Fast Brown 5RN, Acid Red Brown 5K, Nylomine Acid Brown C-R, Baygenal Red Brown LNZR |
| Molecular Formula | C36H26N6Na2O11S3 |
| Molecular Weight | 860.8 |
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