5-(Methylsulfonamido)benzo[b]thiophene-2-carboxylic acid CAS 928709-53-9
| CAS No. | 928709-53-9 |
| Molecular Formula | C10H9NO4S2 |
| Molecular Weight | 271.31 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 5-(Methylsulfonamido)benzo[b]thiophene-2-carboxylic acid (C10H9NO4S2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 271.31 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
5-(Methylsulfonamido)benzo[b]thiophene-2-carboxylic acid (CAS 928709-53-9), molecular formula C10H9NO4S2 and molecular weight 271.31 g/mol, is a CATO reference standard with documented purity and traceability.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), 5-(Methylsulfonamido)benzo[b]thiophene-2-carboxylic acid 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 | C10H9NO4S2 |
| Molecular Weight | 271.31 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.) | 1987 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
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- 2-(Methylsulfonamido)phenyl methanesulfonate (CAS 71270-62-7)
- Ethyl 5-(methylsulfonamido)-1H-indole-2-carboxylate (CAS 179556-14-0)
- 4-(Methylsulfonamido)-2-(trifluoromethyl)benzoic acid (CAS 1314406-51-3)
- Ethyl 3-(methylsulfonamido)benzofuran-2-carboxylate (CAS 1263213-31-5)
- 3-(Methylsulfonamido)-5-nitrobenzamide (CAS 945397-33-1)
- Ethyl 2-(Methylsulfonamido)phenylacetate (CAS 36064-30-9)
Recommended Standards
- 5-(4-Fluorophenyl)-N-phenyl-1,3,4-thiadiazol-2-amine (CAS 827580-58-5)
- 5-(Tert-butoxycarbonyl)-8-hydroxy-5-azaspiro[2.5]Octane-1-carboxylic acid (CAS 2387597-31-9)
- 5-(4-Fluorophenyl)-4-phenyl-4H-1,2,4-triazole-3-thiol (CAS 205806-34-4)
- 5-(Tert-butoxycarbonyl)-8-oxa-5-azaspiro[3.5]Nonane-7-carboxylic acid (CAS 2287310-69-2)
- 4-(4-Methylpiperazin-1-yl)aniline hydrochloride (CAS 194799-59-2)
- Methyl 3-Deoxy-D-arabino-heptulopyranoside-7-Phosphate (CAS 91382-81-9)
- 2-(1,2,3,4-Tetrahydroisoquinolin-2-yl)propan-1-amine dihydrochloride (CAS 1170257-73-4)
- 3-(1-tert-butoxycarbonylpyrrolidin-3-yl)prop-2-ynoic acid (CAS 2172597-24-7)
- N-(5-Cyclopropyl-1,3,4-thiadiazol-2-yl)-2,6-dimethoxybenzamide (CAS 82559-73-7)
- L-Serine hydrochloride (CAS 16428-75-4)
- 19-(tert-Butoxy)-19-oxononadecanoic acid (CAS 1643852-37-2)
- 1-(4-Amino-5-chloro-1H-pyrazol-1-yl)-2-methylpropan-2-ol (CAS 1374830-03-1)
- (4-Methoxy-2,5-dimethylbenzyl)hydrazine dihydrochloride (CAS 887596-54-5)
- Tirzepatide Impurity 46 (CAS CATO-C4X-324046)
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