7-Methyl-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazine-6-sulfonyl chloride CAS 874840-33-2
| CAS No. | 874840-33-2 |
| Molecular Formula | C9H8ClNO4S |
| Molecular Weight | 261.68 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
7-Methyl-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazine-6-sulfonyl chloride (CAS 874840-33-2), molecular formula C9H8ClNO4S and molecular weight 261.68 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 7-Methyl-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazine-6-sulfonyl chloride (C9H8ClNO4S) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. 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. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), 7-Methyl-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazine-6-sulfonyl chloride meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C9H8ClNO4S |
| Molecular Weight | 261.68 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Recommended Standards
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