| Product | Fast Red B Base |
| Synonyms | 5-Nitro-2-aminoanisole |
| CAS # | 97-52-9 |
| Physical Appearance | Yellow to faint greenish-yellow powder |
| Purity (titration) | NLT 98.5% (manual) |
| Melting range | 138-142°C |
| Solution Test | Close to standard |
| Moisture (KF) | NMT 0.5% |
| GC and related substances: | |
| 2-Methoxy-5-nitroaniline(GC, area %) | NMT 0.1% |
| Total unknown impurities (GC, area %) | NMT 0.2% |
| Purity (GC, %area) | NLT 99.8% |
