4-{5-ethyl-6-methyl-4-oxo-3H,4H-thieno[2,3-d]pyrimidin-2-yl}benzoic acid CAS 743439-21-6
| CAS No. | 743439-21-6 |
| Molecular Formula | C16H14N2O3S |
| Molecular Weight | 314.36 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 4-{5-ethyl-6-methyl-4-oxo-3H,4H-thieno[2,3-d]pyrimidin-2-yl}benzoic acid is closely related to a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 4-{5-ethyl-6-methyl-4-oxo-3H,4H-thieno[2,3-d]pyrimidin-2-yl}benzoic acid (CAS 743439-21-6), a certified reference material (molecular formula C16H14N2O3S, MW 314.36 g/mol) for analytical method development and quality control.
4-{5-ethyl-6-methyl-4-oxo-3H,4H-thieno[2,3-d]pyrimidin-2-yl}benzoic acid (C16H14N2O3S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 4-{5-ethyl-6-methyl-4-oxo-3H,4H-thieno[2,3-d]pyrimidin-2-yl}benzoic acid 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 | C16H14N2O3S |
| Molecular Weight | 314.36 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1986 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Recommended Standards
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Why CATO?
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