2,7-Dibromo-9,9’-spirobifluorene CAS 171408-84-7
| CAS No. | 171408-84-7 |
| Molecular Formula | C25H14Br2 |
| Molecular Weight | 474.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 2,7-Dibromo-9,9’-spirobifluorene is closely related to bromine substitution, a polycyclic aromatic system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
2,7-Dibromo-9,9’-spirobifluorene (CAS 171408-84-7), molecular formula C25H14Br2 and molecular weight 474.19 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 2,7-Dibromo-9,9’-spirobifluorene (C25H14Br2) 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. 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), 2,7-Dibromo-9,9’-spirobifluorene 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 | C25H14Br2 |
| Molecular Weight | 474.19 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) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2005 |
| Halogen Content | Br-containing |
Related Dibromo Standards
- 3,6-Dibromo-9,9'-spirobi[fluorene] (CAS 1373114-50-1)
- 2,2’-Dibromo-9,9’-spirobifluorene (CAS 67665-47-8)
- Ethyl 6,6-dibromo-2-(2-chloroacetamido)-7-oxo-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate (CAS 113432-89-6)
- 4,7-Dibromo-2-dodecylisoindoline-1,3-dione (CAS 1159905-88-0)
- 6,8-Dibromo-3-(4-bromobenzyl)quinazolin-4(3H)-one (CAS 302913-27-5)
- Ethyl 2,3-dibromo-3-(4-chloro-2-fluoro-5-(2-(methylamino)-2-oxoethoxy)phenyl)propanoate (CAS 2151826-94-5)
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Recommended Standards
- N'-{6-iodoimidazo[1,2-a]pyridine-2-carbonyl}-4-(trifluoromethyl)benzohydrazide (CAS 860787-45-7)
- P7C3, 98% (CAS 301353-96-8)
- Resmetirom impurity 56 (CAS 3033842-98-4)
- (E)-3-(3-Bromo-5-methoxy-4-(2-oxo-2-((3-(trifluoromethyl)phenyl)amino)ethoxy)phenyl)acrylic acid (CAS 938018-54-3)
- 4-(Furan-2-yl)pyrimidin-2-amine (CAS 206564-00-3)
- [4-(Oxan-4-yloxy)-3-(trifluoromethyl)phenyl]methanamine (CAS 1241910-99-5)
- 1-(3,5-dimethylbenzoyl)piperidin-3-amine (CAS 1305859-79-3)
- Methyl 7-Methoxy-2H-indazole-3-carboxylate (CAS 885278-95-5)
- 3-(5-cyano-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-1-yl)propanoic acid (CAS 18528-07-9)
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