9-Bromo-2,7-di-tert-butyl-9H-fluorene CAS 1242278-88-1
| CAS No. | 1242278-88-1 |
| Molecular Formula | C21H25Br |
| Molecular Weight | 357.33 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
9-Bromo-2,7-di-tert-butyl-9H-fluorene (CAS 1242278-88-1) is a high-purity analytical reference standard with the molecular formula C21H25Br and a molecular weight of 357.33 g/mol.
Based on its molecular formula C21H25Br, 9-Bromo-2,7-di-tert-butyl-9H-fluorene contains bromine substitution, a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 357.33 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C21H25Br |
| Molecular Weight | 357.33 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | Br-containing |
Related Bromo Standards
- 4-Bromo-4'-(trans-4-propylcyclohexyl)-1,1'-biphenyl (CAS 101532-36-9)
- 2-Bromo-9,9-dibutylfluorene (CAS 88223-35-2)
- 6-Bromo-4-methoxy-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-indazole (CAS 2306277-58-5)
- 3-(2-Bromo-4-isopropylphenyl)-1,1-diisopropylthiourea (CAS 1924343-26-9)
- 5-Bromo-2-[3-(tert-butyl-dimethyl-silanyloxy)-pyrrolidin-1-yl]-pyridine (CAS 946002-91-1)
- (E)-2-bromo-6-(3-(pyrrolidin-1-yl)-1-(p-tolyl)prop-1-en-1-yl)pyridine (CAS 1246857-70-4)
- 6-Bromo-4-chloro-3-iodo-1H-pyrrolo[2,3-b]pyridine (CAS 1000340-68-0)
- 4-Bromo-6-chloro-3-iodo-1H-pyrrolo[2,3-b]pyridine (CAS 1000340-78-2)
Recommended Standards
- 1-Benzyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-4-(trimethylsilyl)-1H-1,2,3-triazole (CAS 1130489-19-8)
- (1E)-N-{[3-(trifluoromethyl)phenyl]methoxy}-1H,2H-naphtho[2,1-b]furan-1-imine (CAS 338415-21-7)
- N-(Pyridin-4-ylmethyl)-3-(5-(trifluoromethyl)pyridin-2-yl)benzamide (CAS 1092345-86-2)
- (4-Amino-2-(ethylsulfonyl)pyrimidin-5-yl)(2,3-difluoro-6-methoxyphenyl)methanone (CAS 741713-38-2)
- 5-(5-(Trifluoromethyl)-1,2,4-oxadiazol-3-yl)pyrimidin-2-amine (CAS 1433206-24-6)
- 2-(4-Fluoro-1h-indol-3-yl)acetaldehyde (CAS 1892836-40-6)
- 2-(3-bromopropoxy)-1,3-dimethylbenzene (CAS 3245-54-3)
- 3-(2,3-Dihydro-1,4-benzodioxin-6-yl)propanal (CAS 1082503-42-1)
- 1-Benzyl-3-(2-(6-oxo-3-phenylpyridazin-1(6H)-yl)ethyl)urea (CAS 1021050-79-2)
- 2-(3,3,3-Trifluoropropoxy)nicotinaldehyde (CAS 1701624-13-6)
- 1-Fluoro-3-methoxy-2-(methoxymethoxy)benzene (CAS 2179038-45-8)
- 5-Isopropyl-2,4-dimethoxybenzaldehyde (CAS 1071151-44-4)
- 6-Methyl-4H-chromen-4-one hydrate (CAS 207511-19-1)
- Neuropeptide S (rat) (CAS 412938-75-1)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com