Phenyl 3-(4-methoxyphenyl)-4-oxo-3,4-dihydro-1-phthalazinecarboxylate CAS 338975-88-5
| CAS No. | 338975-88-5 |
| Molecular Formula | C22H16N2O4 |
| Molecular Weight | 372.37 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Phenyl 3-(4-methoxyphenyl)-4-oxo-3,4-dihydro-1-phthalazinecarboxylate (CAS 338975-88-5) is a high-purity analytical reference standard with the molecular formula C22H16N2O4 and a molecular weight of 372.37 g/mol.
Phenyl 3-(4-methoxyphenyl)-4-oxo-3,4-dihydro-1-phthalazinecarboxylate (C22H16N2O4) 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. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C22H16N2O4 |
| Molecular Weight | 372.37 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) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 2 |
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Recommended Standards
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- Z3S2Z6H7B0 945771-74-4 BNC-105 UNII-Z3S2Z6H7B0 2-Methyl-7-hydroxy-3-(3,4,5-trimethoxybenzoyl)-6-methoxybenzofuran (CAS 945771-74-4)
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- Shatavarin IV (CAS 84633-34-1)
- 3-(4-(3-Methoxyphenyl)piperazin-1-yl)propan-1-ol (CAS 67514-08-3)
- N-Methylphenethylamine (CAS 589-08-2)
- 2-Phenyl-3-((3-(trifluoromethyl)phenyl)amino)-1H-inden-1-one (CAS 1024151-74-3)
- 2-(4-Chloro-3-ethoxy-2-fluorophenyl)acetonitrile (CAS 1323966-15-9)
- 4-Hydrazinylquinoline hydrochloride (CAS 68500-41-4)
- (4-(Difluoromethyl)-6-fluoro-5-nitropyridin-3-yl)methanol (CAS 1806883-57-7)
- 3-Bromo-2-fluoro-5-(trifluoromethyl)benzenesulfonyl chloride (CAS 2387196-53-2)
- Semaglutide impurity 71 (CAS CATO-C4X-222671)
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