Ethyl 5-acetyl-4-methyl-2-(methylsulfanyl)thiophene-3-carboxylate CAS 555154-34-2
| CAS No. | 555154-34-2 |
| Molecular Formula | C11H14O3S2 |
| Molecular Weight | 258.36 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.
Ethyl 5-acetyl-4-methyl-2-(methylsulfanyl)thiophene-3-carboxylate (CAS 555154-34-2) is a high-purity analytical reference standard with the molecular formula C11H14O3S2 and a molecular weight of 258.36 g/mol.
Structurally, Ethyl 5-acetyl-4-methyl-2-(methylsulfanyl)thiophene-3-carboxylate (C11H14O3S2) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 258.36 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C11H14O3S2 |
| Molecular Weight | 258.36 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1984 |
| Sulfur Atoms | 2 |
Recommended Standards
- Ethyl 4-acetyl-3-methyl-5-(methylsulfanyl)-2-thiophenecarboxylate (CAS 74597-79-8)
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- ethyl 2-[(aminocarbonothioyl)amino]-4,5-dimethylthiophene-3-carboxylate (CAS 361368-64-1)
- H-Lys-Leu-NH2 (CAS 51640-32-5)
- Spiro[2.5]octane-5,7-dione (CAS 893411-52-4)
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