Ethyl 5-acetyl-3,4-dimethylthieno[2,3-b]thiophene-2-carboxylate CAS 555154-25-1
| CAS No. | 555154-25-1 |
| Molecular Formula | C13H14O3S2 |
| Molecular Weight | 282.38 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 Ethyl 5-acetyl-3,4-dimethylthieno[2,3-b]thiophene-2-carboxylate.
Ethyl 5-acetyl-3,4-dimethylthieno[2,3-b]thiophene-2-carboxylate (CAS 555154-25-1) is a high-purity analytical reference standard with the molecular formula C13H14O3S2 and a molecular weight of 282.38 g/mol.
Ethyl 5-acetyl-3,4-dimethylthieno[2,3-b]thiophene-2-carboxylate (C13H14O3S2) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
CATO manufactures Ethyl 5-acetyl-3,4-dimethylthieno[2,3-b]thiophene-2-carboxylate under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C13H14O3S2 |
| Molecular Weight | 282.38 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, 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.) | 1984 |
| Sulfur Atoms | 2 |
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