5-Bromo-2-(1H-pyrazol-4-yl)isoindolin-1-one CAS 1315544-56-9
| CAS No. | 1315544-56-9 |
| Molecular Formula | C11H8BrN3O |
| Molecular Weight | 278.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
5-Bromo-2-(1H-pyrazol-4-yl)isoindolin-1-one (CAS 1315544-56-9), molecular formula C11H8BrN3O and molecular weight 278.10 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, bromine substitution, 5-Bromo-2-(1H-pyrazol-4-yl)isoindolin-1-one is typically pale yellow to yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 278.10 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
Physical & Chemical Properties
| Molecular Formula | C11H8BrN3O |
| Molecular Weight | 278.10 g/mol |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 3 |
Related Bromo Standards
- 2-Bromo-4-(5-hydroxy-3-methyl-1H-pyrazol-1-yl)benzonitrile (CAS 1008520-71-5)
- 4-Bromo-2-oxo-1-phenyl-1,2-dihydropyridine-3-carbaldehyde (CAS 1088987-94-3)
- 4-Bromo-N-(pyrazin-2-yl)benzamide (CAS 1154240-14-8)
- 4-Bromo-5-(3-isocyanatophenyl)-1-methyl-1H-pyrazole (CAS 1206969-04-1)
- 2-((4-Bromo-2-fluorophenyl)sulfonyl)acetonitrile (CAS 1325304-63-9)
- 6-Bromo-[2,3'-bipyridine]-5'-carboxamide (CAS 1346687-05-5)
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Recommended Standards
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- 3-((5-Bromopyridin-2-yl)oxy)benzaldehyde (CAS 1427460-53-4)
- 8-Aminoadenine (CAS 28128-33-8)
- Methyl 2-(1,1-dichloro-4-oxo-1,1a,2,3,4,8b-hexahydrobenzo[a]cyclopropa[c][7]annulen-3-yl)-2-oxoacetate (CAS 2055840-43-0)
- (2-((Benzyloxy)carbonyl)-1,2,3,4-tetrahydroisoquinolin-6-yl)boronic acid (CAS 1020173-39-0)
- 4-(Benzofuran-2-yl)-1-methoxyisoquinolin-5-ol (CAS 656234-09-2)
- BS3 Crosslinker (disodium) (CAS 127634-19-9)
- 2-Phenoxyoxazole-4-carboxylic acid (CAS 1048919-23-8)
- Tert-butyl 3-(aminomethyl)-1h,4h,5h,6h,7h-pyrazolo[4,3-c]pyridine-5-carboxylate (CAS 1251000-58-4)
- 2-Chloro-3-ethynylthiophene (CAS 1934467-80-7)
- 2-(6-Bromopyridin-2-yl)benzaldehyde (CAS 914349-51-2)
- Semaglutide impurity 268 (CAS CATO-C4X-2226268)
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