[4-(5-oxopyrazolidin-3-yl)phenyl]boronic acid CAS 874290-64-9
| CAS No. | 874290-64-9 |
| Molecular Formula | C9H11BN2O3 |
| Molecular Weight | 206.01 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.
[4-(5-oxopyrazolidin-3-yl)phenyl]boronic acid (CAS 874290-64-9) is a high-purity analytical reference standard with the molecular formula C9H11BN2O3 and a molecular weight of 206.01 g/mol.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, [4-(5-oxopyrazolidin-3-yl)phenyl]boronic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 206.01 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.
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 | C9H11BN2O3 |
| Molecular Weight | 206.01 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 2 |
Related oxopyrazolidin Standards
- 2-(3-Oxopyrazolidin-1-yl)-N-phenylacetamide (CAS 338394-04-0)
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- 1114595-63-9 Methyl (3-oxopyrazolidin-4-yl)acetate MFCD13817362 (CAS 1114595-63-9)
- 2-Oxo-2-(3-oxopyrazolidin-1-yl)ethyl pyrrolidine-1-carbodithioate (CAS 338394-15-3)
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Recommended Standards
- (6-Bromo-3-fluoropyridin-2-yl)methanol (CAS 918793-01-8)
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- (5-Methoxy-1-methyl-1H-pyrrolo[3,2-b]pyridin-6-yl)boronic acid (CAS 956407-29-7)
- 2-Amino-4-bromo-3-fluorophenol (CAS 889939-21-3)
- Tert-butyl 2-amino-9-azabicyclo[3.3.1]Nonane-9-carboxylate (CAS 1823261-31-9)
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- 7-Methylchroman-4-one hydrochloride (CAS 2055840-48-5)
- O-(4-Chlorophenethyl)hydroxylamine (CAS 85661-09-2)
- Methyl 2-oxobicyclo[3.1.0]hexane-1-carboxylate (CAS 61996-11-0)
- 3-(1-Methyl-1H-pyrazol-4-yl)benzaldehyde (CAS 179055-93-7)
- 2-(Difluoromethoxy)-4-mercaptobenzo[d]oxazole (CAS 1803837-01-5)
- Ethyl 7-oxo-5-thiaspiro[3.4]octane-6-carboxylate (CAS 1422354-53-7)
- [Plus-β-Ala28]-Semaglutide (CAS CATO-C4X-2226221)
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