(E)-4-(Ethoxymethylene)-2-phenyloxazol-5(4H)-one CAS 57784-65-3
| CAS No. | 57784-65-3 |
| Molecular Formula | C12H11NO3 |
| Molecular Weight | 217.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 217.22 g/mol gives (E)-4-(Ethoxymethylene)-2-phenyloxazol-5(4H)-one distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies (E)-4-(Ethoxymethylene)-2-phenyloxazol-5(4H)-one (CAS 57784-65-3), a certified reference material (molecular formula C12H11NO3, MW 217.22 g/mol) for analytical method development and quality control.
Based on its molecular formula C12H11NO3, (E)-4-(Ethoxymethylene)-2-phenyloxazol-5(4H)-one contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 217.22 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C12H11NO3 |
| Molecular Weight | 217.22 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; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1973 |
| Nitrogen Atoms | 1 |
Related E Standards
- (4Z)-4-(ethoxymethylene)isoquinoline-1,3(2H,4H)-dione (CAS 18630-93-8)
- (Z)-4-(Ethoxymethylene)-2-phenyloxazol-5(4H)-one (CAS 60777-96-0)
- 4-Ethoxymethylene-2-phenyl-2-oxazolin-5-one (CAS 15646-46-5)
- 4-Ethoxymethylene-isochroman-1,3-dione (CAS 78364-06-4)
- 1,1'-(Ethoxymethylene)bis[benzene] (CAS 5670-78-0)
- 4-(Ethoxymethylene)-2-(furan-2-yl)oxazol-5(4H)-one (CAS 80589-23-7)
- 5-(Ethoxymethylene)-3-methyl-2-thioxothiazolidin-4-one (CAS 6630-58-6)
- 2-Benzyl-4-(ethoxymethylene)oxazol-5(4H)-one (CAS 61369-26-4)
Recommended Standards
- (e)-4-(2-Methoxybenzylidene)-2-methyloxazol-5(4h)-one (CAS 782503-73-5)
- (E)-4-(indolin-1-yl)-4-oxobut-2-enoic acid (CAS 863647-79-4)
- (E)-2-methyl-3-oxo-5-phenyl-2,3-dihydro-1H-pyrazole-4-carbaldehyde oxime (CAS 321533-57-7)
- (E)-Ethyl 2-cyano-2-(2-phenylhydrazono)acetate (CAS 27097-85-4)
- (R)-2-(3-Isopropyl-5-oxopiperazin-1-yl)acetic acid (CAS 1240588-07-1)
- (3-bromopropyl)phosphonic acid (CAS 1190-09-6)
- 4-ethylfuran-2-carboxylic acid (CAS 1515682-02-6)
- (S)-N-Cyclohexyl-N-(2-(methylthio)benzyl)pyrrolidin-3-amine (CAS 820980-54-9)
- 3-Bromo-5-cyano-4-methylbenzenesulfonyl chloride (CAS 1805487-45-9)
- 3-(3-Nitrophenyl)-1-(p-tolyl)-1H-pyrazole-4-carbaldehyde (CAS 618098-91-2)
- Amorolfine Impurity 55 (CAS CATO-C4X-154255)
- (S)-3-Amino-3-(4-bromophenyl)propanoic acid hydrochloride (CAS 930769-56-5)
- N-(4-Aminophenyl)thiophene-2-sulfonamide (CAS 61864-03-7)
- Semaglutide impurity 46 (CAS CATO-C4X-222646)
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