2-Bromo-9,9’-spirobifluorene CAS 171408-76-7
| CAS No. | 171408-76-7 |
| Molecular Formula | C25H15Br |
| Molecular Weight | 395.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 2-Bromo-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.
2-Bromo-9,9’-spirobifluorene (CAS 171408-76-7) is a high-purity analytical reference standard with the molecular formula C25H15Br and a molecular weight of 395.29 g/mol.
Based on its molecular formula C25H15Br, 2-Bromo-9,9’-spirobifluorene contains bromine substitution, a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 395.29 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
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.) | 2005 |
| Halogen Content | Br-containing |
Related Bromo Standards
- 4-Bromo-9,9'-spirobi[fluorene] (CAS 1161009-88-6)
- 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)
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- 6-Bromo-2-naphthyl β-<SC>D</SC>-glucopyranoside (CAS 15548-61-5)
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- 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
- 2,3-Dibenzyl-5-bromobenzoic Acid Methyl Ester (CAS 182676-91-1)
- 2-Ethylbutyl 4-(2-bromophenyl)-6-methyl-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate (CAS 300360-02-5)
- tert-Butyl 3-(6-bromo-1-oxoisoindolin-2-yl)piperidine-1-carboxylate (CAS 1443287-35-1)
- n-((e)-3-(1-((2r,3r,4s,5r)-3,4-Dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)allyl)-2,2,2-trifluoroacetamide (CAS 869222-68-4)
- (2s)-2-(Carbamoylamino)-3-methylbutanoic acid (CAS 26081-02-7)
- 7-(1-(4-Nitrophenoxy)ethyl)-[1,2,4]triazolo[1,5-a]pyrimidin-2-amine (CAS 477865-13-7)
- 3-(3-Methyl-1h-pyrazol-1-yl)propanehydrazide (CAS 512809-82-4)
- 5-(5-Bromothiophen-2-yl)cyclohexane-1,3-dione (CAS 1215652-10-0)
- 3-Amino-2,5-dibromopyrazine (CAS 957230-70-5)
- tert-Butyl (S)-(3-oxo-2,3,4,5-tetrahydro-1H-benzo[c]azepin-4-yl)carbamate (CAS 147239-66-5)
- 4-(Methylthio)-1H-pyrazolo[3,4-d]pyrimidine-3-carbonitrile (CAS 80117-79-9)
- 7-Amino Flunitrazepam-13C,D3 (CAS 1217062-64-0)
- 2-(Ethoxycarbonyl)-3,3-bis(methylthio)acrylic acid (CAS 555154-39-7)
- Semaglutide impurity 48 (CAS CATO-C4X-222648)
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