7,7'-Dibromo-2,2',3,3'-tetramethoxy-9,9'-spirobi[fluorene] CAS 2376198-19-3
| CAS No. | 2376198-19-3 |
| Molecular Formula | C29H22Br2O4 |
| Molecular Weight | 594.29 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
7,7'-Dibromo-2,2',3,3'-tetramethoxy-9,9'-spirobi[fluorene] (CAS 2376198-19-3) is a high-purity analytical reference standard with the molecular formula C29H22Br2O4 and a molecular weight of 594.29 g/mol.
Structurally, 7,7'-Dibromo-2,2',3,3'-tetramethoxy-9,9'-spirobi[fluorene] (C29H22Br2O4) contains a steroid core, a hydroxyl group, an ether linkage, bromine substitution. 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 594.29 g/mol, it falls into the moderately-high-molecular-weight range. 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).
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 | C29H22Br2O4 |
| Molecular Weight | 594.29 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) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1999 |
| Halogen Content | Br-containing |
Related Dibromo Standards
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Recommended Standards
- tert-Butyl 4-(5-(4-chlorophenyl)-4-(pyrimidin-4-yl)-1-tosyl-1h-pyrazol-3-yl)piperidine-1-carboxylate (CAS 503443-67-2)
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- 2,2,3,3,4,4,5,5,5-nonafluoropentyl 9-(dicyanomethylidene)-2,7-dinitro-9H-fluorene-4-carboxylate (CAS 254973-33-6)
- Sodium ((2R,3S,5R)-3-hydroxy-5-(5-iodo-2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)tetrahydrofuran-2-yl)methyl triphosphate (CAS 3731-55-3)
- Fmoc-α-Me-Glu(OtBu)-OH (CAS 1072845-48-7)
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- trans-Cotinine Amide (CAS 939437-34-0)
- Levothyroxine EP Impurity J (CAS 4604-41-5)
- 3-(4-Chlorophenyl)-5-[(2,3-dimethylphenoxy)methyl]-1,2-oxazole (CAS 478066-37-4)
- 2-(6-(Tert-butoxycarbonyl)-6-azaspiro[3.5]Nonan-2-yl)acetic acid (CAS 2306270-53-9)
- 5-Amino-1-(2-methoxyphenyl)-1H-pyrazole-4-carboxylic acid (CAS 14678-94-5)
- 3-(2,4-Difluorophenyl)phenol (CAS 656304-26-6)
- (R)-7-bromo-6-fluorochroman-4-ol (CAS 1568231-12-8)
- Des-Val23-Tirzepatide (CAS CATO-CPTD788950)
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