7-bromo-4-chlorothieno[3,2-d]pyrimidine CAS 31169-27-4
| CAS No. | 31169-27-4 |
| Molecular Formula | C6H10BrClN2S |
| Molecular Weight | 257.58 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
7-bromo-4-chlorothieno[3,2-d]pyrimidine (CAS 31169-27-4), molecular formula C6H10BrClN2S and molecular weight 257.58 g/mol, is a CATO reference standard with documented purity and traceability.
7-bromo-4-chlorothieno[3,2-d]pyrimidine (C6H10BrClN2S) contains a nitrile group, sulfur-containing functionality, chlorine/bromine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C6H10BrClN2S |
| Molecular Weight | 257.58 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 | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1965 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
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- Isavuconazole Impurity 209 (CAS CATO-C4X-1236209)
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