5-Methyl-4,7-dihydro-5H-thieno[2,3-c]pyran-3-carboxylic acid CAS 1169491-35-3
| CAS No. | 1169491-35-3 |
| Molecular Formula | C9H10O3S |
| Molecular Weight | 198.24 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 5-Methyl-4,7-dihydro-5H-thieno[2,3-c]pyran-3-carboxylic acid.
CATO supplies 5-Methyl-4,7-dihydro-5H-thieno[2,3-c]pyran-3-carboxylic acid (CAS 1169491-35-3), a certified reference material (molecular formula C9H10O3S, MW 198.24 g/mol) for analytical method development and quality control.
5-Methyl-4,7-dihydro-5H-thieno[2,3-c]pyran-3-carboxylic acid (C9H10O3S) contains a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, 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).
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), 5-Methyl-4,7-dihydro-5H-thieno[2,3-c]pyran-3-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 | C9H10O3S |
| Molecular Weight | 198.24 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°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.) | 1989 |
| Sulfur Atoms | 1 |
Related Methyl Standards
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