9-Bromo-5-(4-bromophenyl)-2-(4-methoxyphenyl)-5,10b-dihydro-1H-benzo[e]pyrazolo[1,5-c][1,3]oxazine CAS 303061-03-2
| CAS No. | 303061-03-2 |
| Molecular Formula | C23H18Br2N2O2 |
| Molecular Weight | 514.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 514.21 g/mol gives 9-Bromo-5-(4-bromophenyl)-2-(4-methoxyphenyl)-5,10b-dihydro-1H-benzo[e]pyrazolo[1,5-c][1,3]oxazine distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
9-Bromo-5-(4-bromophenyl)-2-(4-methoxyphenyl)-5,10b-dihydro-1H-benzo[e]pyrazolo[1,5-c][1,3]oxazine (CAS 303061-03-2), molecular formula C23H18Br2N2O2 and molecular weight 514.21 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, bromine substitution, 9-Bromo-5-(4-bromophenyl)-2-(4-methoxyphenyl)-5,10b-dihydro-1H-benzo[e]pyrazolo[1,5-c][1,3]oxazine is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 514.21 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C23H18Br2N2O2 |
| Molecular Weight | 514.21 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| 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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
Related Bromo Standards
- N-(3-bromo-2,6-dimethoxy-5-nitrobenzoyl)-N'-(2,3,4,5,6-pentafluorophenyl)urea (CAS 223580-83-4)
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- 5-Bromo-4-((2,4-dichlorobenzyl)thio)-2-(methylthio)pyrimidine (CAS 6341-65-7)
- 3-(7-Bromo-9,9-dimethyl-9H-fluoren-2-yl)-9-phenyl-9H-carbazole (CAS 1186644-43-8)
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- N-(2-Bromo-4-methylphenyl)-2-((4-(4-chlorophenyl)-5-(pyridin-4-yl)-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 476483-87-1)
- N-(4-Bromo-2-methylphenyl)-2-((4-(4-chlorophenyl)-5-(pyridin-4-yl)-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 476483-89-3)
- (R)-7-Bromo-5-methyl-3-(tritylamino)-2,3-dihydrobenzo[b][1,4]oxazepin-4(5H)-one (CAS 2387568-22-9)
Recommended Standards
- 2,4-Dichloro-N-(3,5-dichloro-4-(quinolin-3-yloxy)phenyl)benzenesulfonamide (CAS 315224-26-1)
- 6-Chloro-2,4-bis(2-chlorophenyl)-3-(4-chlorophenyl)-3,4-dihydroquinazolin-4-ol (CAS 77549-04-3)
- 4-(2,4-Dichlorobenzoyl)-N'-[2-(2,4-dichlorophenoxy)ethanimidoyl]-1-methyl-1H-pyrrole-2-carbohydrazide (CAS 338395-71-4)
- Ethyl 6-chloro-4-(4-chlorophenyl)-5-[(1E)-{[(2,4-dichlorophenyl)methoxy]imino}methyl]-2-methyl-1,4-dihydropyridine-3-carboxylate (CAS 478261-87-9)
- [2-(pyrrolidin-1-ylmethyl)phenyl]methanamine (CAS 91271-77-1)
- β-2-Deoxy Zebularine (CAS 22003-30-1)
- 1-[(tert-Butoxy)carbonyl]-2,3,6,7-tetrahydro-1H-azepine-4-carboxylic acid (CAS 1273567-28-4)
- 2-(3,4-Dihydroxyphenyl)-N-(prop-2-yn-1-yl)acetamide (CAS 1332585-62-2)
- 2-(2-Methylbut-3-yn-2-yl)-6-(5-(2-methylbut-3-yn-2-yl)-1,3,4-thiadiazol-2-yl)-5H-[1,3,4]thiadiazolo[3,2-a][1,3,5]triazine-5,7(6H)-dione (CAS 1394838-87-9)
- 3-(2,4-Dimethoxyphenyl)-3H-[1,2,3]triazolo[4,5-b]pyridine (CAS 62052-19-1)
- (2-Ethylpyrimidin-5-yl)boronic acid (CAS 2225174-81-0)
- tert-Butyl (S)-4-oxo-2-phenylpiperidine-1-carboxylate (CAS 1391742-11-2)
- 2-(4-(Benzyloxy)-2-ethylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS 2412496-29-6)
- Semaglutide Impurity 246 (CAS CATO-C4X-2226246)
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