5-ethyl-4-methylthiophene-2-carboxylic acid CAS 40808-25-1
| CAS No. | 40808-25-1 |
| Molecular Formula | C8H14O2S |
| Molecular Weight | 174.26 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 5-ethyl-4-methylthiophene-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.
5-ethyl-4-methylthiophene-2-carboxylic acid (CAS 40808-25-1), molecular formula C8H14O2S and molecular weight 174.26 g/mol, is a CATO reference standard with documented purity and traceability.
5-ethyl-4-methylthiophene-2-carboxylic acid (C8H14O2S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions.
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 | C8H14O2S |
| Molecular Weight | 174.26 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Stable under recommended storage conditions |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1968 |
| Sulfur Atoms | 1 |
Related ethyl Standards
- 4-ethyl-5-methylthiophene-3-carboxylic acid (CAS 884497-34-1)
- 5-Methylthiophene-3-sulfonamide (CAS 1017264-52-6)
- 3-Methylthiophene-2-sulfonamide (CAS 81417-51-8)
- 5-Methylthiophene-2-sulfonamide (CAS 53595-69-0)
- N-methylthiophene-2-sulfonamide (CAS 53442-30-1)
- 3-Methylthiophene-2-sulfonic acid (CAS 1159877-58-3)
- Ethyl 4-methylthiophene-2-carboxylate (CAS 14282-79-2)
- 4-Ethyl-5-methylthiophene-2-carboxylic acid (CAS 154828-65-6)
Recommended Standards
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- 5-propylthiophene-3-carboxylic acid (CAS 883546-51-8)
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- Ethyl tetrahydro-2H-thiopyran-4-carboxylate (CAS 856939-74-7)
- 6-Methyl-2-oxo-4-[(5,6,7,8-tetrahydro-2-naphthyl)amino]-1,2-dihydropyridine-3-carboxylic Acid (CAS 1239521-17-5)
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- N-[(1S,2S)-2-(Dimethylamino)cyclohexyl]-2-pyridinecarboxamide (CAS 1507359-08-1)
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- 2-(Bromomethyl)-6-(difluoromethyl)benzonitrile (CAS 1261819-57-1)
- Methyl(2-methyl-4-propoxyphenyl)sulfane (CAS 1443346-57-3)
- 3-Iodo-1-methyl-2-phenyl-1h-pyrrolo[2,3-b]pyridine (CAS 945608-15-1)
- 1-[3-(trifluoromethyl)phenyl]-1h-pyrazol-3-amine (CAS 66000-41-7)
- Semaglutide impurity 22(OtBu-Ste-γGlu(OtBu)-AEEA-AEEA-OH) (CAS 1118767-16-0)
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