2-Ethyl-4,5-dimethylthieno[2,3-d]pyrimidine-6-carboxylic acid CAS 929975-02-0
| CAS No. | 929975-02-0 |
| Molecular Formula | C11H12N2O2S |
| Molecular Weight | 236.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-Ethyl-4,5-dimethylthieno[2,3-d]pyrimidine-6-carboxylic acid (CAS 929975-02-0), molecular formula C11H12N2O2S and molecular weight 236.29 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 2-Ethyl-4,5-dimethylthieno[2,3-d]pyrimidine-6-carboxylic acid (C11H12N2O2S) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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), 2-Ethyl-4,5-dimethylthieno[2,3-d]pyrimidine-6-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 | C11H12N2O2S |
| Molecular Weight | 236.29 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Ethyl Standards
- 5-Acetyl-3,4-dimethylthieno[2,3-b]thiophene-2-carbonitrile (CAS 845266-23-1)
- 2-({5,6-dimethylthieno[2,3-d]pyrimidin-4-yl}amino)acetic acid (CAS 384353-04-2)
- 1-((5,6-Dimethylthieno[2,3-d]pyrimidin-4-yl)amino)propan-2-ol (CAS 853689-05-1)
- Methyl 3,4-dimethylthieno[2,3-b]thiophene-2-carboxylate (CAS 175202-66-1)
- 2-Ethyl-5,6-dimethylthieno[2,3-d]pyrimidine-4-thiol (CAS 917746-80-6)
- 5-Ethyl-2,6-dimethylthieno[2,3-d]pyrimidine-4-thiol (CAS 917747-86-5)
- 2-((5,6-Dimethylthieno[2,3-d]pyrimidin-4-yl)amino)-N-methylacetamide (CAS 923818-75-1)
- Methyl 2,4-dimethylthieno[3,4-b]pyridine-7-carboxylate (CAS 74695-25-3)
Recommended Standards
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- 3-(4-Fluorophenyl)-1-(4-methylphenyl)-1h-pyrazole-4-carbaldehyde (CAS 618098-45-6)
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