Ethyl 4-oxo-4H-thieno[3,2-d][1,3]oxazine-2-carboxylate CAS 869299-09-2
| CAS No. | 869299-09-2 |
| Molecular Formula | C9H7NO4S |
| Molecular Weight | 225.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Ethyl 4-oxo-4H-thieno[3,2-d][1,3]oxazine-2-carboxylate (CAS 869299-09-2), a certified reference material (molecular formula C9H7NO4S, MW 225.22 g/mol) for analytical method development and quality control.
The molecular framework of Ethyl 4-oxo-4H-thieno[3,2-d][1,3]oxazine-2-carboxylate (C9H7NO4S) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C9H7NO4S |
| Molecular Weight | 225.22 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Recommended Standards
- Ethyl 2-((4-fluorobenzyl)amino)-2-oxoacetate (CAS 828298-11-9)
- Ethyl 5-(isothiazol-5-yl)-1,3,4-oxadiazole-2-carboxylate (CAS 2137530-47-1)
- Ethyl [(3-fluoro-4-methylphenyl)carbamoyl]formate (CAS 69066-06-4)
- Ethyl 6-fluoro-3,4-dihydro-2H-benzo[b][1,4]oxazine-2-carboxylate (CAS 220120-59-2)
- 2-Amino-2-hydroxyacetic acid (CAS 4746-62-7)
- 6-Fluoro-1-oxo-1,2-dihydroisoquinoline-4-carboxylic acid (CAS 583880-88-0)
- 3-Fluoro-5-nitropyridin-4-ol (CAS 1806294-57-4)
- 4-(Cyclopropylmethyl)-7,7-diphenyl-1,4-oxazepane hydrochloride (CAS 60163-06-6)
- 3-(5-Bromo-1H-indazol-1-yl)propanenitrile (CAS 1312138-92-3)
- 5-[(4-phenoxyphenyl)amino]-1,3,4-thiadiazole-2-thiol (CAS 380431-13-0)
- 2-Nitrophenyl β-D-Xylopyranoside (CAS 10238-27-4)
- 2-Chloro-1-(1H-indol-3-yl)-2-phenylethanone (CAS 42883-45-4)
- 6-Methoxy-2-(4-methoxyphenyl)-1H-indole (CAS 62655-56-5)
- CBP501 Affinity Peptide trifluoroacetate salt (CAS 1351804-17-5)
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