3,7-Dichloro-5,5-dimethyl-5H-dibenzo[b,f]silepine CAS 1278522-47-6
| CAS No. | 1278522-47-6 |
| Molecular Formula | C26H18Cl2Si |
| Molecular Weight | 429.41 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to chlorine substitution, a polycyclic aromatic system, 3,7-Dichloro-5,5-dimethyl-5H-dibenzo[b,f]silepine is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 429.41 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
3,7-Dichloro-5,5-dimethyl-5H-dibenzo[b,f]silepine (CAS 1278522-47-6), molecular formula C26H18Cl2Si and molecular weight 429.41 g/mol, is a CATO reference standard with documented purity and traceability.
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.
CATO manufactures 3,7-Dichloro-5,5-dimethyl-5H-dibenzo[b,f]silepine under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C26H18Cl2Si |
| Molecular Weight | 429.41 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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) | 17.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Cl-containing |
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- 1-Ethynyl-2,5-difluoro-4-nitrobenzene (CAS 2229084-84-6)
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