7-Bromo-3,4-dihydropyrrolo[1,2-a]pyrazin-1(2H)-one CAS 736990-40-2
| CAS No. | 736990-40-2 |
| Molecular Formula | C7H7BrN2O |
| Molecular Weight | 215.05 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to an amide group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system, 7-Bromo-3,4-dihydropyrrolo[1,2-a]pyrazin-1(2H)-one is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 215.05 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.
7-Bromo-3,4-dihydropyrrolo[1,2-a]pyrazin-1(2H)-one (CAS 736990-40-2) is a high-purity analytical reference standard with the molecular formula C7H7BrN2O and a molecular weight of 215.05 g/mol.
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 | C7H7BrN2O |
| Molecular Weight | 215.05 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 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1986 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
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