4-Ethylidene-2-methyloxazol-5(4H)-one CAS 4974-23-6
| CAS No. | 4974-23-6 |
| Molecular Formula | C6H7NO2 |
| Molecular Weight | 125.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Ethylidene-2-methyloxazol-5(4H)-one (CAS 4974-23-6), molecular formula C6H7NO2 and molecular weight 125.13 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 4-Ethylidene-2-methyloxazol-5(4H)-one is typically off-white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 125.13 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
CATO manufactures 4-Ethylidene-2-methyloxazol-5(4H)-one under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C6H7NO2 |
| Molecular Weight | 125.13 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 1 |
Related Ethylidene Standards
- 2-Ethylidene-4-methyloxazol-5(2H)-one (CAS 13895-32-4)
- 5-Ethylidene-4-hydroxy-1H-pyrrol-2(5H)-one (CAS 63592-07-4)
- 5-Ethylidene-2-norbornene (Mixture of endo and ex) (CAS 16219-75-3)
- 1-Ethylidene-2-phenylhydrazine (CAS 935-07-9)
- Ethylidene,2-methoxy-1-(4-methylphenyl)-2-oxo- (CAS 428482-12-6)
- (E)-4-Ethylidene-5-methyl-3-(propan-2-ylidene)pyrrolidin-2-one (CAS 37817-45-1)
- (Z)-4-Ethylidene-5-methyl-3-(propan-2-ylidene)pyrrolidin-2-one (CAS 37817-28-0)
- N'-Ethylidene-5-methylisoxazole-3-carbohydrazide (CAS 90000-70-7)
Recommended Standards
- 4-Amino-6-methylpyrimidin-2(1H)-one (CAS 6220-50-4)
- 4H,5H,6H,7H-[1,2,3,4]Tetrazolo[1,5-a]pyrimidine (CAS 803739-51-7)
- 4-Amino-6-hydroxy-2-methylpyrimidine (CAS 767-16-8)
- 4-Hydrazinylpyrimidin-2-amine (CAS 33575-09-6)
- tert-Butyl 5-chlorospiro[2H-indole-3,4'-piperidine]-1-carboxylate;hydrochloride (CAS 1188264-23-4)
- N,N-Dimethyl-4-{[(5-oxo-3-phenyl-1,5-dihydro-4H-pyrazol-4-yliden)methyl]amino}benzenesulfonamide (CAS 320415-75-6)
- 4-(5-Methoxy-4-methoxycarbonyl-2-trifluoromethyl-phenyl)-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl ester (CAS 1418273-44-5)
- 2-(Ethylamino)-2-(1-methyl-1H-pyrazol-4-yl)acetic acid (CAS 1218278-62-6)
- Cyclopropyl(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-5,6-dihydropyridin-1(2H)-yl)methanone (CAS 1616388-38-5)
- 4-(2-Chlorophenyl)-1,2-dihydro-3h-pyrazol-3-imine (CAS 95750-98-4)
- 1,2-Dibromo-4-fluoro-5-nitrobenzene (CAS 1807056-85-4)
- 2-Bromo-6-[(4-methoxyphenyl)methoxy]pyridine (CAS 1240620-34-1)
- 5-nitro-1H-indole-3-carboxamide (CAS 128200-32-8)
- (Leu31,Pro34)-Peptide YY (human) trifluoroacetate salt (CAS 179986-95-9)
Why CATO?
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