5-Chloro-2-oxo-2,3-dihydrobenzo[d]oxazole-6-sulfonamide CAS 5791-18-4
| CAS No. | 5791-18-4 |
| Molecular Formula | C7H5ClN2O4S |
| Molecular Weight | 248.64 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
5-Chloro-2-oxo-2,3-dihydrobenzo[d]oxazole-6-sulfonamide (CAS 5791-18-4) is a high-purity analytical reference standard with the molecular formula C7H5ClN2O4S and a molecular weight of 248.64 g/mol.
Based on its molecular formula C7H5ClN2O4S, 5-Chloro-2-oxo-2,3-dihydrobenzo[d]oxazole-6-sulfonamide contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 248.64 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C7H5ClN2O4S |
| Molecular Weight | 248.64 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, water |
| 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.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Chloro Standards
- 6-Chloro-3-(4-fluorophenyl)-[1,2,4]triazolo[4,3-b]pyridazine (CAS 1094260-22-6)
- 6-Chloro-3-(2-fluorophenyl)-[1,2,4]triazolo[4,3-b]pyridazine (CAS 1094354-48-9)
- 6-Chloro-3-(3-fluorophenyl)[1,2,4]triazolo[4,3-b]pyridazine (CAS 1094425-19-0)
- 3-Chloro-6-(4-fluorophenyl)-[1,2,4]triazolo[4,3-b]pyridazine (CAS 1116743-29-3)
- 2-(2-Chloro-4-fluorophenoxy)nicotinonitrile (CAS 1183594-45-7)
- 6-Chloro-5-fluoro-2-(pyrazin-2-yl)-1H-benzo[d]imidazole (CAS 1257535-23-1)
- 5-Chloro-2-(2-fluorophenyl)oxazolo[5,4-b]pyridine (CAS 126921-80-0)
- 4-Chloro-1-(3-fluorophenyl)-1H-pyrazolo[3,4-d]pyrimidine (CAS 1269702-96-6)
Recommended Standards
- 4-Chloro-1-(4-fluorophenyl)-1h-pyrazolo[3,4-d]pyrimidine (CAS 885524-07-2)
- 6-Chloro-2-(2-fluorophenyl)oxazolo[5,4-b]pyridine (CAS 52334-31-3)
- 4-Chloro-1-(2-fluorophenyl)pyrazolo[3,4-d]pyrimidine (CAS 630107-83-4)
- diethyl (4-chlorophenyl)phosphonate (CAS 2373-43-5)
- IRMOF-8 (CAS 473981-43-0)
- 5-Isopropyl-1-methyl-1H-imidazole (CAS 196304-02-6)
- 3-(Piperidin-4-yl)propan-1-ol hydrochloride (CAS 155270-01-2)
- 2-(4-Fluorophenyl)-N-(2-nitrobenzyl)ethanamine (CAS 355816-87-4)
- 2-methoxy-3-fluoropyridine (CAS 884494-69-3)
- 2-Bromo-5-((tert-butoxycarbonyl)amino)-4-methylbenzoic acid (CAS 1881987-02-5)
- 2-Pivalamidoisonicotinic acid (CAS 470463-34-4)
- CAS 326495-37-8 (CAS 326495-37-8)
- 2-Oxo-2,3-dihydro-1H-benzo[d]imidazole-1-carbonyl chloride (CAS 65657-53-6)
- Galanin Message Associated Peptide (1-41) amide trifluoroacetate salt (CAS 132699-74-2)
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