4-Bromo-1-methyl-1H-pyrazole hydrochloride CAS 1881331-69-6
| CAS No. | 1881331-69-6 |
| Molecular Formula | C4H5BrN2 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 4-Bromo-1-methyl-1H-pyrazole hydrochloride (C4H5BrN2HCl) 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. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
4-Bromo-1-methyl-1H-pyrazole hydrochloride (CAS 1881331-69-6) is a high-purity analytical reference standard with the molecular formula C4H5BrN2HCl and a molecular weight of 197.46 g/mol.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 4-Bromo-1-methyl-1H-pyrazole hydrochloride meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C4H5BrN2 HCl |
| Molecular Weight | 197.46 g/mol |
| 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 | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1995 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 2 |
Related Bromo Standards
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Recommended Standards
- 6,6'-Dibromo-3,3'-bipyridine (CAS 147496-14-8)
- 5-trifluoromethyl-1H-pyrazolo[3,4-b]pyridine-3-carboxylic acid (CAS 1256820-22-0)
- 6-Methyl-2H-indazol-4-ol (CAS 705927-36-2)
- 1-(2-(Dimethylamino)oxazol-5-yl)ethanone (CAS 344747-06-4)
- N1-((1-Benzylpiperidin-4-yl)methyl)-N1-isopropylethane-1,2-diamine (CAS 1353974-22-7)
- Methyl benzooxazol-2-yl-acetate (CAS 75762-23-1)
- 3-(2-Aminoethyl)-6-cyclopropylpyrimidin-4(3H)-one (CAS 1706456-75-8)
- 3-bromo-1-(4-fluorophenyl)-1H-1,2,4-triazole (CAS 623577-63-9)
- 9,9-Dimethyl-N,N-di-p-tolyl-9H-fluoren-2-amine (CAS 132571-92-7)
- Semaglutide Impurity 187 (CAS CATO-C4X-2226187)
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