170953-74-9 3-Ethoxy-5-isothiazolecarboxylic Acid Methyl Ester Methyl-3-ethoxyisothiazole-5-carboxylate CAS 170953-74-9
| CAS No. | 170953-74-9 |
| Molecular Formula | C7H9NO3S |
| Molecular Weight | 187.22 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.
170953-74-9 3-Ethoxy-5-isothiazolecarboxylic Acid Methyl Ester Methyl-3-ethoxyisothiazole-5-carboxylate (CAS 170953-74-9) is a high-purity analytical reference standard with the molecular formula C7H9NO3S and a molecular weight of 187.22 g/mol.
Based on its molecular formula C7H9NO3S, 170953-74-9 3-Ethoxy-5-isothiazolecarboxylic Acid Methyl Ester Methyl-3-ethoxyisothiazole-5-carboxylate contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 187.22 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.
As a certified reference material (CRM), 170953-74-9 3-Ethoxy-5-isothiazolecarboxylic Acid Methyl Ester Methyl-3-ethoxyisothiazole-5-carboxylate 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 | C7H9NO3S |
| Molecular Weight | 187.22 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2005 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
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Recommended Standards
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- 5-Methyl-6-propoxypyridine-3-boronic acid (CAS 2096332-81-7)
- 1-(Methylsulfonyl)cyclopropane-1-carbothioamide (CAS 1713588-41-0)
- 1-Ethyl-3-nitro-1h-pyrazole-5-carboxylic acid (CAS 1006441-04-8)
- 4,4-Difluoroisoquinoline-1,3(2H,4H)-dione (CAS 1443981-83-6)
- 5-(4-Methylphenyl)-1-phenyl-1H-pyrazole-4-carboxylic acid (CAS 936127-73-0)
- Des-Ser32-Tirzepatide (CAS CATO-CPTD788942)
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