| CAS No. | 36822-09-0 |
| Molecular Formula | C10H5ClN2S |
| Molecular Weight | 220.68 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 220.68 g/mol gives 4-Chlorobenzo[4,5]thieno[3,2-d]pyrimidine distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
4-Chlorobenzo[4,5]thieno[3,2-d]pyrimidine (CAS 36822-09-0), molecular formula C10H5ClN2S and molecular weight 220.68 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C10H5ClN2S, 4-Chlorobenzo[4,5]thieno[3,2-d]pyrimidine contains a nitrogen-containing heterocyclic scaffold, a nitrile group, sulfur-containing functionality, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 220.68 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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), 4-Chlorobenzo[4,5]thieno[3,2-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.
| Molecular Formula | C10H5ClN2S |
| Molecular Weight | 220.68 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1967 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |