3-Bromo-4-nitro-1h-indazole CAS 74209-17-9
| CAS No. | 74209-17-9 |
| Molecular Formula | C7H4BrN3O2 |
| Molecular Weight | 242.03 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Bromo-4-nitro-1h-indazole (CAS 74209-17-9) is a high-purity analytical reference standard with the molecular formula C7H4BrN3O2 and a molecular weight of 242.03 g/mol.
3-Bromo-4-nitro-1h-indazole (C7H4BrN3O2) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C7H4BrN3O2 |
| Molecular Weight | 242.03 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1978 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 3 |
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Recommended Standards
- 3-Bromo-2-nitrobenzofuran (CAS 65847-81-6)
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- 5-(4-Chlorophenyl)thiazol-2-amine (CAS 73040-66-1)
- 1-(4-Methoxy-3-{[4-(4-nitrophenyl)piperazin-1-yl]-methyl}phenyl)-2,3,4,9-tetrahydro-1H-beta-carboline (CAS 387882-94-2)
- 4-(3-Ethoxy-propyl)-5-pyridin-4-yl-4H-[1,2,4]triazole-3-thiol (CAS 519150-20-0)
- Dopamine impurity 110 (CAS CATO-C4X-1908110)
- Benzyl 1-(4-chlorophenyl)-2,5-dihydro-5-oxo-1H-1,2,4-triazole-3-carboxylate (CAS 1000577-09-2)
- Fosfomycin Trometamol Enantiomer 1 AND 2Mixture (CAS CATO-C4X-131632)
- 4-(Cyclohexanecarboxamido)cyclohexanecarboxylic acid (CAS 351334-98-0)
- Semaglutide impurity 76 (CAS CATO-C4X-222676)
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