5,9-Dibromospiro[benzo[c]fluorene-7,9'-fluorene] CAS 1242570-65-5
| CAS No. | 1242570-65-5 |
| Molecular Formula | C29H16Br2 |
| Molecular Weight | 524.25 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5,9-Dibromospiro[benzo[c]fluorene-7,9'-fluorene] (C29H16Br2) contains bromine substitution, a polycyclic aromatic system. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
5,9-Dibromospiro[benzo[c]fluorene-7,9'-fluorene] (CAS 1242570-65-5), molecular formula C29H16Br2 and molecular weight 524.25 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.
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.
Physical & Chemical Properties
| Molecular Formula | C29H16Br2 |
| Molecular Weight | 524.25 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) | 21.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Br-containing |
Related Dibromospiro Standards
- 1’-Boc-2,7-dibromospiro[fluorene-9,4’-piperidine] (CAS 1616113-98-4)
- 2',7'-Dibromospiro[fluorene-9,9'-xanthene] (CAS 1346002-88-7)
- 2,7-Dibromospiro[9H-fluorene-9,9'-[9H]xanthene] (CAS 198142-65-3)
- 2,7-Dibromospiro[fluorene-9,8'-indolo[3,2,1-de]acridine] (CAS 902525-12-6)
- 2',7'-Dibromospiro[cyclopenta[1,2-b:5,4-b']dipyridine-5,9'-fluorene] (CAS 198142-63-1)
- 2',7'-Dibromospiro[dibenzo[c,h]xanthene-7,9'-fluorene] (CAS 1185855-23-5)
- 2',7'-Dibromospiro[adamantane-2,9'-fluorene] (CAS 727730-32-7)
- 1’-Acetyl-2,7-dibromospiro[fluorene-9,4’-piperidine] (CAS 1616114-00-1)
Recommended Standards
- Diethyl 3,3'-(2,7-dibromo-9h-fluorene-9,9-diyl)dipropionate (CAS 204265-70-3)
- 3'-(3,4-Dichlorophenyl)-1-[(2,4-dichlorophenyl)methyl]-1,2-dihydrospiro[indole-3,2'-[1,3]thiazolidine]-2,4'-dione (CAS 338406-10-3)
- 1-((6-Amino-9-((4aR,6R,7R,7aS)-2,7-dihydroxy-2-oxidotetrahydro-4H-furo[3,2-d][1,3,2]dioxaphosphinin-6-yl)-9H-purin-8-yl)thio)-4-bromobutane-2,3-dione (CAS 124357-34-2)
- 3'-(3,4-Dichlorophenyl)-1-[(3,4-dichlorophenyl)methyl]-1,2-dihydrospiro[indole-3,2'-[1,3]thiazolidine]-2,4'-dione (CAS 338418-90-9)
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