4-((Benzoyloxy)imino)-5,6-dihydro-4H-thieno[2,3-b]thiopyran 7,7-dioxide CAS 338963-51-2
| CAS No. | 338963-51-2 |
| Molecular Formula | C14H11NO4S2 |
| Molecular Weight | 321.37 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-((Benzoyloxy)imino)-5,6-dihydro-4H-thieno[2,3-b]thiopyran 7,7-dioxide (CAS 338963-51-2), molecular formula C14H11NO4S2 and molecular weight 321.37 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C14H11NO4S2, 4-((Benzoyloxy)imino)-5,6-dihydro-4H-thieno[2,3-b]thiopyran 7,7-dioxide contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 321.37 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C14H11NO4S2 |
| Molecular Weight | 321.37 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
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Recommended Standards
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- (S)-2-(1-Pyrrolidinyl)butyric Acid (CAS 1932273-32-9)
- tert-Butyl 4-bromo-3-(hydroxymethyl)-1H-indole-1-carboxylate (CAS 914349-05-6)
- Ethyl 2-(5-Fluoro-3-indolyl)-2-oxoacetate (CAS 127561-11-9)
- 1-(2-(4-Chlorophenyl)-4-methylthiazol-5-yl)ethyl 4-chlorobenzoate (CAS 866049-64-1)
- 3-Ethoxy-2,4-difluorobenzoyl chloride (CAS 1017779-90-6)
- Methyl (1S)-(+)-10-Camphorsulfonate (CAS 62319-13-5)
- 7-Hydroxy-2-isopropyl-3-(p-tolyl)quinazolin-4(3H)-one (CAS 871814-53-8)
- N-Formyl-N-methylbenzamide (CAS 141264-25-7)
- 6-(1H-pyrazol-1-yl)nicotinaldehyde (CAS 1097198-86-1)
- Tirzepatide Impurity 47 (CAS CATO-C4X-324047)
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