4-Bromo-1-methyl-5-nitropyrazole CAS 89607-11-4
| CAS No. | 89607-11-4 |
| Molecular Formula | C4H4BrN3O2 |
| Molecular Weight | 206.00 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 206.00 g/mol gives 4-Bromo-1-methyl-5-nitropyrazole distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 4-Bromo-1-methyl-5-nitropyrazole (CAS 89607-11-4), a certified reference material (molecular formula C4H4BrN3O2, MW 206.00 g/mol) for analytical method development and quality control.
Owing to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, 4-Bromo-1-methyl-5-nitropyrazole is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 206.00 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C4H4BrN3O2 |
| Molecular Weight | 206.00 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1982 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 3 |
Related Bromo Standards
- 4-Bromo-1-methyl-2-nitro-1H-imidazole (CAS 121816-79-3)
- 5-bromo-2-methyl-triazole-4-carboxylic acid (CAS 1372711-56-2)
- 5-bromo-3-methyl-triazole-4-carboxylic acid (CAS 1391631-21-2)
- Methyl 5-Bromo-1H-1,2,3-triazole-4-carboxylate (CAS 1427475-25-9)
- 2-(3-Bromo-1H-1,2,4-triazol-1-yl)acetic acid (CAS 1449369-00-9)
- 5-Bromo-1-methyl-1H-1,2,4-triazole-3-carboxylic acid (CAS 1514615-46-3)
- 5-Bromo-1-methyl-2-nitro-1H-imidazole (CAS 151597-78-3)
- 5-bromo-1-methyl-triazole-4-carboxylic acid (CAS 1554430-81-7)
Recommended Standards
- 4-Bromo-1-methyl-5-nitro-1H-imidazole (CAS 59177-47-8)
- 4-Bromo-5-methyl-3-nitro-1H-pyrazole (CAS 70951-96-1)
- 4-Amino-2,6-dichloro-5-fluoronicotinonitrile (CAS 2763159-67-5)
- 5-Bromo-1H-1,2,4-triazole-3-carbohydrazide (CAS 2089334-17-6)
- 3-(3-Isopropylphenoxy)azetidine (CAS 1219982-18-9)
- 5-(4-Methoxyphenyl)-1h-imidazole-2-thiol (CAS 10486-41-6)
- 7-Nitro-4-(pyridin-2-ylmethyl)-2H-benzo[b][1,4]oxazin-3(4H)-one (CAS 120101-66-8)
- 3-Chloro-5-methoxy-4-((4-methylbenzyl)oxy)benzaldehyde (CAS 351066-32-5)
- 2-(tert-Butyl)oxazolo[4,5-c]pyridine (CAS 873914-35-3)
- 4-Fluoro-3,5-dinitrobenzoic acid (CAS 2365-71-1)
- 6-(Difluoromethyl)-5-fluoropyridin-2-amine (CAS 1315611-83-6)
- Candesartan Impurity 11 (CAS CATO-C4X-157211)
- 5-Methoxy-2-(2,2,2-trifluoroethoxy)benzoic acid (CAS 175205-34-2)
- Semaglutide impurity 266 (CAS CATO-C4X-2226266)
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