4-(Diphenylmethylene)-2-phenyloxazol-5(4H)-one CAS 139517-52-5
| CAS No. | 139517-52-5 |
| Molecular Formula | C22H15NO2 |
| Molecular Weight | 325.36 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-(Diphenylmethylene)-2-phenyloxazol-5(4H)-one (CAS 139517-52-5) is a high-purity analytical reference standard with the molecular formula C22H15NO2 and a molecular weight of 325.36 g/mol.
Structurally, 4-(Diphenylmethylene)-2-phenyloxazol-5(4H)-one (C22H15NO2) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 16.0, corresponding to approximately 16 ring(s) or double-bond equivalent(s). With a molecular weight of 325.36 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C22H15NO2 |
| Molecular Weight | 325.36 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| 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) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Nitrogen Atoms | 1 |
Related Diphenylmethylene Standards
- 6-(2-(Diphenylmethylene)hydrazineyl)quinoline (CAS 1012879-55-8)
- N'-(diphenylmethylene)-2-morpholinoacetohydrazide (CAS 339106-17-1)
- N'-(diphenylmethylene)-2-(piperidin-1-yl)acetohydrazide (CAS 478247-21-1)
- Ethyl 2-((diphenylmethylene)amino)-4-methylpent-4-enoate (CAS 80741-44-2)
- N-(Diphenylmethylene)glycine Benzyl Ester (CAS 81477-91-0)
- 9-(Diphenylmethylene)-9H-fluorene (CAS 4709-68-6)
- Ethyl 5-[(Diphenylmethylene)amino]-2-pyrimidinecarboxylate (CAS 1434128-44-5)
- Methyl 5-((diphenylmethylene)amino)pyrimidine-2-carboxylate (CAS 1383802-11-6)
Recommended Standards
- S-guanine alcohol (CAS 1369530-26-6)
- 3-(5-(3,4-Diethoxyphenyl)-1H-1,2,4-triazol-3-yl)phenol (CAS 1416347-14-2)
- N-[(9H-fluoren-9-ylmethoxy)carbonyl]-N-methylalanine (CAS 1362858-88-5)
- 1,2-Dichloro-4-nitro-5-(trichloromethoxy)benzene (CAS 1417567-32-8)
- 3-Amino-N-isopropyl-1H-1,2,4-triazole-5-carboxamide (CAS 932723-98-3)
- 2-Methoxy-4,6-bis(trifluoromethyl)benzoyl chloride (CAS 886503-47-5)
- 1-Benzyl-1,5,6,7-tetrahydro-4H-indazol-4-one (CAS 115310-16-2)
- Dapagliflozin Impurity 145 (CAS 1971128-00-3)
- 2-Amino-4-(1-hydroxyethyl)-1H-imidazol-5-ol (CAS 339345-77-6)
- 2-(5-(Pyridin-3-yl)-1,3,4-oxadiazol-2-yl)benzoic acid (CAS 56894-56-5)
- (R)-1-(4-cyanophenyl)piperidine-3-carboxylic acid (CAS 1260596-45-9)
- N-(5-iodo-6-methylpyridin-2-yl)propionamide (CAS 677294-33-6)
- Bis[(dicyclohexyl)(4-dimethylaminophenyl)phosphine] palladium(II) chloride (CAS 945375-77-9)
- Mast Cell Degranulating (MCD) Peptide HR-2 (CAS 80388-04-1)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com