2,7-Dibromo-9,9-di-p-tolyl-9H-fluorene CAS 357645-37-5
| CAS No. | 357645-37-5 |
| Molecular Formula | C27H20Br2 |
| Molecular Weight | 504.26 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 2,7-Dibromo-9,9-di-p-tolyl-9H-fluorene (CAS 357645-37-5), a certified reference material (molecular formula C27H20Br2, MW 504.26 g/mol) for analytical method development and quality control.
Owing to bromine substitution, a polycyclic aromatic system, 2,7-Dibromo-9,9-di-p-tolyl-9H-fluorene is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 504.26 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), 2,7-Dibromo-9,9-di-p-tolyl-9H-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 | C27H20Br2 |
| Molecular Weight | 504.26 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) | 17.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Br-containing |
Related Dibromo Standards
- (R)-1-(3,6-Dibromo-9H-carbazol-9-yl)-3-((3-methoxyphenyl)amino)propan-2-ol (CAS 1235481-41-0)
- (S)-1-(3,6-Dibromo-9H-carbazol-9-yl)-3-((3-methoxyphenyl)amino)propan-2-ol (CAS 1235481-43-2)
- 2,7-Dibromo-9-(tridecan-7-ylidene)-9H-fluorene (CAS 738580-15-9)
- 4,4'-(((2,5-Dibromo-1,4-phenylene)bis(methylene))bis(oxy))dibenzaldehyde (CAS 2304559-58-6)
- 2,6-Dibromo-4,4-dihexyl-4H-cyclopenta[2,1-b:3,4-b’]dithiophene (CAS 528570-55-0)
- 1,2-DIbromo-1-(perfluoro-n-hexyl)ethylene (CAS 59665-28-0)
- (E)-[(5,7-Dibromo-1-benzofuran-2-yl)(phenyl)methylidene]amino thiophene-2-carboxylate (CAS 477858-33-6)
- 6,8-Dibromo-2-(4-(phenylsulfonyl)phenyl)quinoline (CAS 861210-54-0)
Recommended Standards
- 1H,1H-Perfluoroheptyl p-toluenesulfonate (CAS 883500-11-6)
- Iopamidol Impurity 29 (CAS 2756222-40-7)
- 1-(3-(Perfluorohexyl)-5-phenyl-1H-pyrazol-1-yl)ethan-1-one (CAS 959580-83-7)
- Iopamidol Impurity 30 (CAS 2756222-41-8)
- Zolpidem Phenyl-4-carboxylic Acid Ethyl Ester (CAS 1026465-13-3)
- [1-(cyanomethyl)cyclopropyl]methanesulfonyl chloride (CAS 1466482-26-7)
- Stellasterol (CAS 2465-11-4)
- (Phenylsulfinylmethyl-<SUP>13</SUP>C) diethyl ether (CAS 1202865-59-5)
- benzyl(methyl)[2-(piperazin-1-yl)ethyl]amine (CAS 1018545-42-0)
- Firsocostat (CAS 1434635-54-7)
- 6-(4-Fluorophenyl)-2-oxo-4-(trifluoromethyl)-1,2-dihydropyridine-3-carbonitrile (CAS 366022-33-5)
- Ald-Ph-PEG4-NH-Boc (CAS 2110449-01-7)
- 7-Azabicyclo[2.2.1]heptan-2-one (CAS 1174209-70-1)
- Semaglutide Main Chain P29 (CAS 1169630-82-3)
Why CATO?
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