| CAS No. | 18733-98-7 |
| Molecular Formula | C24H16Br4Si |
| Molecular Weight | 652.09 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 652.09 g/mol gives 1,1',1'',1'''-Silanetetrayltetrakis[4-bromobenzene] distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
1,1',1'',1'''-Silanetetrayltetrakis[4-bromobenzene] (CAS 18733-98-7), molecular formula C24H16Br4Si and molecular weight 652.09 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to bromine substitution, a polycyclic aromatic system, 1,1',1'',1'''-Silanetetrayltetrakis[4-bromobenzene] is typically pale yellow to yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 652.09 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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.
As a certified reference material (CRM), 1,1',1'',1'''-Silanetetrayltetrakis[4-bromobenzene] 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 | C24H16Br4Si |
| Molecular Weight | 652.09 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | Br-containing |