Diethyl 3,3'-(2,7-dibromo-9h-fluorene-9,9-diyl)dipropionate CAS 204265-70-3
| CAS No. | 204265-70-3 |
| Molecular Formula | C23H24Br2O4 |
| Molecular Weight | 524.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Diethyl 3,3'-(2,7-dibromo-9h-fluorene-9,9-diyl)dipropionate (CAS 204265-70-3), molecular formula C23H24Br2O4 and molecular weight 524.24 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a flavonoid core, a hydroxyl group, an ether linkage, bromine substitution, Diethyl 3,3'-(2,7-dibromo-9h-fluorene-9,9-diyl)dipropionate is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 524.24 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
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 | C23H24Br2O4 |
| Molecular Weight | 524.24 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, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2015 |
| Halogen Content | Br-containing |
Related Diethyl Standards
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Recommended Standards
- 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)
- 5,9-Dibromospiro[benzo[c]fluorene-7,9'-fluorene] (CAS 1242570-65-5)
- 6-Thio-Inosine-5'-triphosphate (CAS 27652-34-2)
- 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)
- 6-Chloro-3-(4a-hydroxydecahydroisoquinolin-1-yl)-4H-chromen-4-one (CAS 342608-64-4)
- Tert-butyl (S)-6-(1-aminoethyl)-3,4-dihydro-1,7-naphthyridine-1(2H)-carboxylate (CAS 2387565-09-3)
- N-(2-Chloro-4-methylphenyl)-2-{[3-methyl-7-(4-methylphenyl)-4-oxo-3H,4H-thieno[3,2-d]pyrimidin-2-yl]sulfanyl}acetamide (CAS 1040631-92-2)
- 3-Iodo-5-nitro-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-indazole (CAS 918440-15-0)
- 3-Methyl-2-oxo-2,3-dihydro-1H-pyrido[3,4-b][1,4]oxazine-7-carbonitrile (CAS 1956369-57-5)
- 6,6-difluorobicyclo[3.1.0]hexan-3-amine hydrochloride (CAS 1955524-13-6)
- (6-chloranylpyridin-3-yl)-morpholin-4-yl-methanone (6-chloro-3-pyridinyl)-(4-morpholinyl)methanone 64614-49-9 A834829 (CAS 64614-49-9)
- 6-(tert-Butyl)-5-fluoronicotinaldehyde (CAS 1289211-04-6)
- tert-Butyl 6-hydroxy-3-iodo-1H-indazole-1-carboxylate (CAS 1221178-70-6)
- [D-Ser6]-Semaglutide (CAS CATO-C4X-2226287)
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