| CAS No. | 18549-83-2 |
| Molecular Formula | C18H28Si3 |
| Molecular Weight | 328.67 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 328.67 g/mol gives 1,1,1,3,3,3-Hexamethyl-2,2-diphenyltrisilane distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
1,1,1,3,3,3-Hexamethyl-2,2-diphenyltrisilane (CAS 18549-83-2) is a high-purity analytical reference standard with the molecular formula C18H28Si3 and a molecular weight of 328.67 g/mol.
Based on its molecular formula C18H28Si3, 1,1,1,3,3,3-Hexamethyl-2,2-diphenyltrisilane contains an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 328.67 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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.
| Molecular Formula | C18H28Si3 |
| Molecular Weight | 328.67 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | Stable under recommended storage conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |