10234-92-1 4-[(4,5-dimethoxy-2-nitrophenyl)methylidene]-3-methyl-1-phenyl-4,5-dihydro-1H-pyrazol-5-one MS-9187 CAS 10234-92-1
| CAS No. | 10234-92-1 |
| Molecular Formula | C19H17N3O5 |
| Molecular Weight | 367.36 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 10234-92-1 4-[(4,5-dimethoxy-2-nitrophenyl)methylidene]-3-methyl-1-phenyl-4,5-dihydro-1H-pyrazol-5-one MS-9187 is closely related to a flavonoid core, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 10234-92-1 4-[(4,5-dimethoxy-2-nitrophenyl)methylidene]-3-methyl-1-phenyl-4,5-dihydro-1H-pyrazol-5-one MS-9187 (CAS 10234-92-1), a certified reference material (molecular formula C19H17N3O5, MW 367.36 g/mol) for analytical method development and quality control.
10234-92-1 4-[(4,5-dimethoxy-2-nitrophenyl)methylidene]-3-methyl-1-phenyl-4,5-dihydro-1H-pyrazol-5-one MS-9187 (C19H17N3O5) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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.
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 | C19H17N3O5 |
| Molecular Weight | 367.36 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°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 |
| Degree of Unsaturation (DBE) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1959 |
| Nitrogen Atoms | 3 |
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