3-Bromo-6,7-dihydro-4H-pyrazolo[5,1-c][1,4]oxazin-4-ol CAS 2090221-76-2
| CAS No. | 2090221-76-2 |
| Molecular Formula | C6H7BrN2O2 |
| Molecular Weight | 219.04 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.
3-Bromo-6,7-dihydro-4H-pyrazolo[5,1-c][1,4]oxazin-4-ol (CAS 2090221-76-2), molecular formula C6H7BrN2O2 and molecular weight 219.04 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 3-Bromo-6,7-dihydro-4H-pyrazolo[5,1-c][1,4]oxazin-4-ol (C6H7BrN2O2) is characterized by an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system. 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.
As a certified reference material (CRM), 3-Bromo-6,7-dihydro-4H-pyrazolo[5,1-c][1,4]oxazin-4-ol 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 | C6H7BrN2O2 |
| Molecular Weight | 219.04 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1997 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Bromo Standards
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- tert-Butyl 2-chloro-5H,6H,7H,8H-pyrido[3,4-d]pyrimidine-7-carboxylate (CAS 1196156-15-6)
- 3-Formylpyrazolo[1,5-a]pyridine-5-carboxylic acid (CAS 1101120-11-9)
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