4-(2-Oxo-1,3,4-oxadiazol-3(2H)-yl)benzenesulfonamide CAS 64890-57-9
| CAS No. | 64890-57-9 |
| Molecular Formula | C8H7N3O4S |
| Molecular Weight | 241.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-(2-Oxo-1,3,4-oxadiazol-3(2H)-yl)benzenesulfonamide (CAS 64890-57-9) is a high-purity analytical reference standard with the molecular formula C8H7N3O4S and a molecular weight of 241.22 g/mol.
4-(2-Oxo-1,3,4-oxadiazol-3(2H)-yl)benzenesulfonamide (C8H7N3O4S) 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C8H7N3O4S |
| Molecular Weight | 241.22 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.) | 1975 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Oxo Standards
- 2-(5-Butyl-1,3,4-oxadiazol-2-yl)-1h-indole (CAS 1105195-99-0)
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- 2-(1,2,4-Oxadiazol-3-yl)-4-(trifluoromethyl)benzaldehyde (CAS 1262413-46-6)
- 5-(3-Phenyl-1,2,4-oxadiazol-5-yl)pyrimidin-4(3H)-one (CAS 1215535-02-6)
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Recommended Standards
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- 4-Fluoro-5-morpholino-2-nitroaniline (CAS 215734-56-8)
- Methyl 2-[2-(4-amino-3-fluorophenyl)-1,3-benzoxazol-5-yl]acetate (CAS 695186-53-9)
- 6-Chloro-2-(difluoromethyl)-5-nitropyridin-3-ol (CAS 1805386-28-0)
- 2-(5-Amino-4-methyl-2-oxopyridin-1(2h)-yl)acetamide (CAS 1522337-00-3)
- (4-Iodo-2-nitrophenyl)hydrazine (CAS 89640-59-5)
- 1-(P-tolylthio)cyclobutane-1-carboxylic acid (CAS 1492623-52-5)
- (2S,3S)-2,3-bis(4-methoxybenzoyloxy)butanedioic acid; bis((5R)-1-benzyl-5-methyl-1,4-diazepane) (CAS 1644457-23-7)
- 1-(2-Nitrophenyl)-1H-pyrazole-5-carbaldehyde (CAS 1269292-09-2)
- [2,3'-bipyridine]-5-carboxylic acid (CAS 5059-52-9)
- 4-(3-CHloro-5-nitrobenzoyl)morpholine (CAS 1495622-04-2)
- Acetyl Tetrapeptide-11 (CAS 928006-88-6)
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