4-Bromo-1-(2-methanesulfonylethyl)-3,5-dimethyl-1h-pyrazole CAS 1247899-26-8
| CAS No. | 1247899-26-8 |
| Molecular Formula | C8H13BrN2O2S |
| Molecular Weight | 281.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Bromo-1-(2-methanesulfonylethyl)-3,5-dimethyl-1h-pyrazole (CAS 1247899-26-8), molecular formula C8H13BrN2O2S and molecular weight 281.17 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C8H13BrN2O2S, 4-Bromo-1-(2-methanesulfonylethyl)-3,5-dimethyl-1h-pyrazole contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 281.17 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.
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.
CATO manufactures 4-Bromo-1-(2-methanesulfonylethyl)-3,5-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 | C8H13BrN2O2S |
| Molecular Weight | 281.17 g/mol |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
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Recommended Standards
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- Ornidazole Impurity 77 (CAS CATO-C4X-133177)
- Ornidazole Impurity 100 (CAS CATO-C4X-1331100)
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- 3-Benzoylbenzoyl chloride (CAS 77301-47-4)
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- LCZ-696 Impurity 43 (CAS 2216755-67-6)
- Posaconazole impurity 234 (CAS CATO-C4X-1208234)
- N-(tert-Butyl)-2-phenylquinolin-4-amine (CAS 128924-95-8)
- 3-{[5-(pyridin-4-yl)-1,3,4-thiadiazol-2-yl]carbamoyl}propanoic acid (CAS 1179399-95-1)
- 2-(1-(3-Methylbut-2-en-1-yl)-3-oxopiperazin-2-yl)acetic acid (CAS 1033600-38-2)
- Macrophage Inhibitory Peptide (CAS 41961-56-2)
Why CATO?
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