2,4-dimethoxythieno[2,3-d]pyrimidine CAS 18740-40-4
| CAS No. | 18740-40-4 |
| Molecular Formula | C8H16N2O2S |
| Molecular Weight | 204.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C8H16N2O2S, 2,4-dimethoxythieno[2,3-d]pyrimidine contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic functional-group stretching vibrations in infrared spectroscopy. The molecular weight of 204.29 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
2,4-dimethoxythieno[2,3-d]pyrimidine (CAS 18740-40-4), molecular formula C8H16N2O2S and molecular weight 204.29 g/mol, is a CATO reference standard with documented purity and traceability.
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), 2,4-dimethoxythieno[2,3-d]pyrimidine 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 | C8H16N2O2S |
| Molecular Weight | 204.29 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 | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related dimethoxythieno Standards
Recommended Standards
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- 4-Chloro-2-(3-chlorophenyl)-5-(4-(2,6-dinitro-4-(trifluoromethyl)phenyl)piperazin-1-yl)pyridazin-3(2H)-one (CAS 477867-41-7)
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- Insulin Degludec Impurity 12 (CAS CATO-C4X-215712)
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