3,4-Diphenyl-7-methoxycoumarin CAS 33257-76-0
| CAS No. | 33257-76-0 |
| Molecular Formula | C22H16O3 |
| Molecular Weight | 328.36 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 3,4-Diphenyl-7-methoxycoumarin is closely related to a steroid core, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
3,4-Diphenyl-7-methoxycoumarin (CAS 33257-76-0), molecular formula C22H16O3 and molecular weight 328.36 g/mol, is a CATO reference standard with documented purity and traceability.
3,4-Diphenyl-7-methoxycoumarin (C22H16O3) contains a steroid core, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C22H16O3 |
| Molecular Weight | 328.36 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 chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
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- 3-Ethoxy-4-((1-methyl-4-nitro-1H-pyrazol-3-yl)oxy)benzaldehyde (CAS 1429417-51-5)
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- 1-(3,5-Difluoro-2-methoxyphenyl)ethanone (CAS 303043-97-2)
- 5-Nitro-4-(trifluoromethyl)pyridin-2-amine (CAS 1000152-83-9)
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- N-phenylazetidine-3-sulfonamide (CAS 1803591-41-4)
- Revefenacin Dimer Impurity 8 (CAS CATO-C4X-20318)
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