4-Bromo-9,9'-spirobi[fluorene] CAS 1161009-88-6
| CAS No. | 1161009-88-6 |
| Molecular Formula | C25H15Br |
| Molecular Weight | 395.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Bromo-9,9'-spirobi[fluorene] (CAS 1161009-88-6), molecular formula C25H15Br and molecular weight 395.29 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 4-Bromo-9,9'-spirobi[fluorene] (C25H15Br) contains bromine substitution, a polycyclic aromatic system. The molecule exhibits a degree of unsaturation (DBE) of 18.0, corresponding to approximately 18 ring(s) or double-bond equivalent(s). With a molecular weight of 395.29 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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), 4-Bromo-9,9'-spirobi[fluorene] 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 | C25H15Br |
| Molecular Weight | 395.29 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, 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.) | 1989 |
| Halogen Content | Br-containing |
Related Bromo Standards
- 3-Bromo-9,9'-spirobi[fluorene] (CAS 1361227-58-8)
- 4-(4-Bromo-2-cyanophenoxymethyl)-piperidine-1-carboxylic acid tert-butyl ester (CAS 1426921-34-7)
- 1-bromo-9,9'-Spirobi[9H-fluorene] (CAS 1450933-18-2)
- 6-Bromo-2-naphthyl β-<SC>D</SC>-glucopyranoside (CAS 15548-61-5)
- 2-Bromo-9,9’-spirobifluorene (CAS 171408-76-7)
- 2-Bromo-5-(1-tosylpiperidin-2-yl)pyridine (CAS 1352524-62-9)
- 2-Bromo-3-(1-tosylpiperidin-2-yl)pyridine (CAS 1352527-63-9)
- 2-Bromo-N-[4-(2,3-dihydro-1H-indol-1-ylsulfonyl)-phenyl]acetamide (CAS 1138445-69-8)
Recommended Standards
- Capivasertib Impurity 46 (CAS CATO-C4X-331246)
- N-(1-(3,4-dichlorobenzyl)-2-oxo-1,2-dihydropyridin-3-yl)-4-methylpiperazine-1-carboxamide (CAS 338755-44-5)
- 5-(3-Chlorophenyl)-2-(4-chlorophenyl)-5,10b-dihydro-1H-benzo[e]pyrazolo[1,5-c][1,3]oxazine (CAS 302914-18-7)
- tert-Butyl 3-(6-bromo-1-oxoisoindolin-2-yl)piperidine-1-carboxylate (CAS 1443287-35-1)
- 4-Bromo-2-(piperazin-1-ylmethyl)phenol (CAS 1400541-81-2)
- 2-{[(4-{[4-(Benzyloxy)phenyl]methoxy}phenyl)methyl][(3-fluorophenyl)methyl]amino}acetic acid (CAS 1253528-13-0)
- Epiyangambin (CAS 24192-64-1)
- Ethyl ((4-(trifluoromethyl)phenyl)carbamothioyl)glycinate (CAS 321433-99-2)
- 1-(4-Chlorophenyl)-3-[(3,4-dichlorophenyl)amino]propan-1-one (CAS 135779-28-1)
- N-Chlorophthalimide (CAS 3481-09-2)
- Ethyl (e)-2-oxo-4-(thiophen-3-yl)but-3-enoate (CAS 1031927-95-3)
- 5-(Aminomethyl)-1-(cyclopropylmethyl)pyridin-2(1H)-one (CAS 1400635-87-1)
- {5-oxaspiro[2.4]heptan-1-yl}methanamine (CAS 1536988-52-9)
- Insulin Degludec Impurity 8 (CAS CATO-C4X-21578)
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