4,5-Dibromo-1,3-dimethyl-1H-pyrazole CAS 5744-71-8
| CAS No. | 5744-71-8 |
| Molecular Formula | C5H6Br2N2 |
| Molecular Weight | 253.92 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 4,5-Dibromo-1,3-dimethyl-1H-pyrazole.
4,5-Dibromo-1,3-dimethyl-1H-pyrazole (CAS 5744-71-8) is a high-purity analytical reference standard with the molecular formula C5H6Br2N2 and a molecular weight of 253.92 g/mol.
Structurally, 4,5-Dibromo-1,3-dimethyl-1H-pyrazole (C5H6Br2N2) contains a nitrile group, bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 253.92 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 4,5-Dibromo-1,3-dimethyl-1H-pyrazole under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C5H6Br2N2 |
| Molecular Weight | 253.92 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.) | 1958 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Dibromo Standards
- 3,5-Dibromo-1,4-dimethyl-1H-pyrazole (CAS 134589-54-1)
- 3,5-Dibromo-1-ethyl-1H-pyrazole (CAS 1596745-76-4)
- 4,5-Dibromo-1,2-dimethyl-1H-imidazole (CAS 16954-05-5)
- 2,4-Dibromo-1,5-dimethyl-1H-imidazole (CAS 850429-57-1)
- 2,5-Dibromo-1,4-dimethyl-1H-imidazole (CAS 850429-58-2)
- 3,4-Dibromo-1,5-dimethyl-1h-pyrazole (CAS 5775-95-1)
- 4,5-Dibromo-2-ethyl-1H-imidazole (CAS 4002-82-8)
- 1,3-Dibromo-5-fluorobenzene (CAS 1435-51-4)
Recommended Standards
- 4-Bromo-1-(2-bromoethyl)-1H-pyrazole (CAS 214614-82-1)
- Tetrachlorothiophene Dioxide (CAS 72448-17-0)
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- Tris(2,2-difluoroethyl) borate (CAS 1396338-09-2)
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- 4-(3-Fluoro-4-nitrophenoxy)-6,7-dimethoxyquinoline hydrochloride (CAS 2232877-37-9)
- 2-(5-Oxo-4-(p-tolyl)-4,5-dihydro-1H-1,2,4-triazol-1-yl)acetonitrile (CAS 866149-37-3)
- Semaglutide impurity 76 (CAS CATO-C4X-222676)
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