912569-70-1 4-Bromo-1-methyl-1H-pyrazole-3-carbonyl chloride DTXSID70345511 CAS 912569-70-1
| CAS No. | 912569-70-1 |
| Molecular Formula | C5H4BrClN2O |
| Molecular Weight | 223.46 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
912569-70-1 4-Bromo-1-methyl-1H-pyrazole-3-carbonyl chloride DTXSID70345511 (CAS 912569-70-1), molecular formula C5H4BrClN2O and molecular weight 223.46 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C5H4BrClN2O, 912569-70-1 4-Bromo-1-methyl-1H-pyrazole-3-carbonyl chloride DTXSID70345511 contains an amide group, a hydroxyl group, an ether linkage, chlorine/bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 223.46 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), 912569-70-1 4-Bromo-1-methyl-1H-pyrazole-3-carbonyl chloride DTXSID70345511 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 | C5H4BrClN2O |
| Molecular Weight | 223.46 g/mol |
| Appearance | Off-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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 2 |
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