4-Bromo-1-(cyclopropylmethyl)-1H-pyrazole hydrochloride CAS 1609407-65-9
| CAS No. | 1609407-65-9 |
| Molecular Formula | C7H9BrN2 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 4-Bromo-1-(cyclopropylmethyl)-1H-pyrazole hydrochloride (C7H9BrN2HCl) is characterized by a nitrile group, chlorine/bromine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
4-Bromo-1-(cyclopropylmethyl)-1H-pyrazole hydrochloride (CAS 1609407-65-9) is a high-purity analytical reference standard with the molecular formula C7H9BrN2HCl and a molecular weight of 237.53 g/mol.
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 | C7H9BrN2 HCl |
| Molecular Weight | 237.53 g/mol |
| Appearance | White to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, 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 |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1993 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 2 |
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- 1-(4-EThylphenyl)-1h-pyrrole (CAS 383137-78-8)
- 4-(4-Chlorophenyl)-5-(4-methoxyphenyl)-4h-1,2,4-triazole-3-thiol (CAS 142142-23-2)
- Potassium trifluoro(6-(fluoromethyl)pyridin-3-yl)borate (CAS 2221990-90-3)
- 3-(2-Fluorophenyl)-1-methyl-1H-pyrazol-5-amine (CAS 1012879-56-9)
- 4-Bromo-6-methoxy-1-benzofuran (CAS 1427420-47-0)
- 3-amino-6-ethynyl-pyridine-2-carbonitrile (CAS 160602-48-2)
- Semaglutide impurity 80 (CAS CATO-C4X-222680)
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