Methyl 4-oxo-4H-thieno[3,2-d][1,3]oxazine-2-carboxylate CAS 1379334-58-3

Description

Compared with other compounds in its class, the molecular weight of 211.19 g/mol gives Methyl 4-oxo-4H-thieno[3,2-d][1,3]oxazine-2-carboxylate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

Methyl 4-oxo-4H-thieno[3,2-d][1,3]oxazine-2-carboxylate (CAS 1379334-58-3), molecular formula C8H5NO4S and molecular weight 211.19 g/mol, is a CATO reference standard with documented purity and traceability.

Methyl 4-oxo-4H-thieno[3,2-d][1,3]oxazine-2-carboxylate (C8H5NO4S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).

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

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