(3-(Dibromomethylene)penta-1,4-diyne-1,5-diyl)bis(trimethylsilane) CAS 133968-81-7
| CAS No. | 133968-81-7 |
| Molecular Formula | C12H18Br2Si2 |
| Molecular Weight | 378.25 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
(3-(Dibromomethylene)penta-1,4-diyne-1,5-diyl)bis(trimethylsilane) (CAS 133968-81-7) is a high-purity analytical reference standard with the molecular formula C12H18Br2Si2 and a molecular weight of 378.25 g/mol.
Owing to bromine substitution, (3-(Dibromomethylene)penta-1,4-diyne-1,5-diyl)bis(trimethylsilane) is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 378.25 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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), (3-(Dibromomethylene)penta-1,4-diyne-1,5-diyl)bis(trimethylsilane) 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 | C12H18Br2Si2 |
| Molecular Weight | 378.25 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1995 |
| Halogen Content | Br-containing |
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