4-Oxo-2-azetidinecarboxylic acid CAS 98019-65-9
| CAS No. | 98019-65-9 |
| Molecular Formula | C4H5NO3 |
| Molecular Weight | 115.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Oxo-2-azetidinecarboxylic acid (CAS 98019-65-9), molecular formula C4H5NO3 and molecular weight 115.09 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C4H5NO3, 4-Oxo-2-azetidinecarboxylic acid 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 115.09 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
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 | C4H5NO3 |
| Molecular Weight | 115.09 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1985 |
| Nitrogen Atoms | 1 |
Related Oxo Standards
- 3-Azetidinecarboxylic acid, 3-methyl- (CAS 1213240-07-3)
- 2-Azetidinecarboxylic acid, 1-methyl-, (2R)- (CAS 255883-21-7)
- 2-Azetidinecarboxylic Acid (CAS 2517-04-6)
- 3-Azetidinecarboxylic acid (CAS 36476-78-5)
- 1-Acetyl-3-azetidinecarboxylic Acid (CAS 97628-91-6)
- 2-Azetidinecarboxylic acid, 1-(1-methylethyl)-, (2S)- (CAS 255882-98-5)
- 1-Azetidinecarboxylic acid, 3-hydroxy-, phenylmethyl ester (CAS 128117-22-6)
- 1-Azetidinecarboxylic acid, 3-fluoro-3-(hydroxymethyl)-, phenylmethyl ester (CAS 1374658-54-4)
Recommended Standards
- 4-Methyloxazolidine-2,5-dione (CAS 30291-41-9)
- 5-Aminoimidazolidine-2,4-dione (CAS 24764-63-4)
- 4-Amino-4-oxobut-2-enoic acid (CAS 4452-01-1)
- 5-Methyloxazolidine-2,4-dione (CAS 27770-23-6)
- (4-(5,6-Dihydro-4H-1,3-oxazin-2-yl)phenyl)boronic acid (CAS 850568-68-2)
- N-(4-(2-fluoroethoxy)phenyl)acetamide (CAS 714-24-9)
- Tris(acetonitrile)cyclopentadienylruthenium(II) hexafluorophosphate 80049-61-2 (CYCLOPENTADIENYL)TRIS(ACETONITRILE)RUTHENIUM HEXAFLUOROPHOSPHATE;TRIS(ACETONITRILE)CYCLOPENTADIENYLRUTHENIUM HEXAFLUOROPHOSPHATE;TRIS(ACETONITRILE)CYCLOPENTADIENYLRUTHENIUM(I) HEXAFLUOROPHOSPHATE;TRIS(ACETONITRILE)CYCLOPENTADIENYLRUTHENIUM(II) HEXAFLUOROPHOSPHATE SC10290 (CAS 80049-61-2)
- (S)-tert-Butyl ((1-(2-amino-3-methylbutanoyl)piperidin-4-yl)methyl)(ethyl)carbamate (CAS 1354003-30-7)
- 2-Hydroxy-4-(methylsulfonyl)isophthalic acid (CAS 329695-25-2)
- (4-(Propionyloxy)phenyl)boronic acid (CAS 352535-90-1)
- (3S,5S)-3,5-difluoropiperidine;hydrochloride (CAS 2742623-56-7)
- (S)-tert-butyl 2-(4,5-dibromo-1H-imidazol-2-yl)pyrrolidine-1-carboxylate (CAS 1240893-76-8)
- Ethyl 5-(methylsulfonamido)benzo[b]thiophene-2-carboxylate (CAS 1631712-98-5)
- Semaglutide impurity 214 (CAS CATO-C4X-2226214)
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