2,7-Dibromo-9,9-dipropylfluorene CAS 157771-56-7
| CAS No. | 157771-56-7 |
| Molecular Formula | C19H20Br2 |
| Molecular Weight | 408.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of 2,7-Dibromo-9,9-dipropylfluorene (C19H20Br2) is characterized by bromine substitution, a polycyclic aromatic system. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
2,7-Dibromo-9,9-dipropylfluorene (CAS 157771-56-7) is a high-purity analytical reference standard with the molecular formula C19H20Br2 and a molecular weight of 408.17 g/mol.
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), 2,7-Dibromo-9,9-dipropylfluorene 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 | C19H20Br2 |
| Molecular Weight | 408.17 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2002 |
| Halogen Content | Br-containing |
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Recommended Standards
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- Methyl (s)-3-amino-3-(4-isopropylphenyl)propanoate (CAS 1213940-30-7)
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- 3,5-Dimethyl-4H-Pyrazole (CAS 409320-89-4)
- 1-(6-Chloro-2-methylpyridin-3-yl)ethan-1-one (CAS 439111-18-9)
- Semaglutide impurity 49 (CAS CATO-C4X-222649)
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