4-ethyl-4H-thieno[3,2-b]pyrrole-5-carboxylic acid CAS 924643-45-8
| CAS No. | 924643-45-8 |
| Molecular Formula | C9H15NO2S |
| Molecular Weight | 201.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 4-ethyl-4H-thieno[3,2-b]pyrrole-5-carboxylic acid.
4-ethyl-4H-thieno[3,2-b]pyrrole-5-carboxylic acid (CAS 924643-45-8), molecular formula C9H15NO2S and molecular weight 201.29 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H15NO2S, 4-ethyl-4H-thieno[3,2-b]pyrrole-5-carboxylic acid contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 201.29 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 4-ethyl-4H-thieno[3,2-b]pyrrole-5-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 | C9H15NO2S |
| Molecular Weight | 201.29 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Recommended Standards
- 4-aminothieno[3,2-c]pyridine-7-carboxamide (CAS 55040-50-1)
- 4-methyl-1,3-benzothiazole-2-carboxylic acid (CAS 3507-47-9)
- 4-aminobenzothiophene-2-carboxylic acid (CAS 478076-38-9)
- 5-((Pentylthio)methyl)isoxazol-3(2H)-one (CAS 89660-68-4)
- 3-(3-Chloro-4-(trifluoromethyl)phenyl)propanoic acid (CAS 1036395-80-8)
- tert-Butyl 2-azabicyclo[2.2.1]heptan-7-ylcarbamate (CAS 1250995-45-9)
- 2-(1-Chloroethyl)-5-methylfuran (CAS 917769-48-3)
- 4-(Difluoromethyl)-3-fluoro-5-methoxy-2-nitropyridine (CAS 1806968-99-9)
- 4-(tert-Butyl)-2-(2,4-difluorophenyl)pyridine (CAS 583052-24-8)
- [(5-Chloro-2-methyl-phenyl)-methanesulfonyl-amino]-acetic acid (CAS 362715-18-2)
- 1,3-Dioxolane-2-propan-1-ol (CAS 85391-14-6)
- 1-(oxolan-2-yl)prop-2-yn-1-amine (CAS 1495393-47-9)
- 2-(((2-Chlorothiazol-5-yl)methyl)(cyclopropyl)amino)acetic acid (CAS 1353978-38-7)
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