2,2'-(2,5-Bis(bromomethyl)-1,4-phenylene)bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolane) CAS 1356822-77-9
| CAS No. | 1356822-77-9 |
| Molecular Formula | C20H30B2Br2O4 |
| Molecular Weight | 515.88 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2,2'-(2,5-Bis(bromomethyl)-1,4-phenylene)bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolane) (CAS 1356822-77-9) is a high-purity analytical reference standard with the molecular formula C20H30B2Br2O4 and a molecular weight of 515.88 g/mol.
Owing to a steroid core, a hydroxyl group, an ether linkage, bromine substitution, 2,2'-(2,5-Bis(bromomethyl)-1,4-phenylene)bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolane) is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 515.88 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.
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 | C20H30B2Br2O4 |
| Molecular Weight | 515.88 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | Br-containing |
Related Bis Standards
- 1,4-Bis(bromomethyl)-2,5-diiodobenzene (CAS 56403-29-3)
- 9,10-Bis(4-(bromomethyl)phenyl)anthracene (CAS 941703-52-2)
- 1,2-Bis(4-(bromomethyl)phenyl)-1,2-diphenylethene (CAS 1053241-67-0)
- 3-(Bromomethyl)-4-methylquinolin-2(1H)-one (CAS 91348-38-8)
- 4,4',4''-Tris(bromomethyl)-2,2':6',2''-terpyridine (CAS 1309964-62-2)
- 2,5-Bis(bromomethyl)-1,4-bis(octyloxy)benzene (CAS 147274-72-4)
- 2,7-Bis(bromomethyl)-9,9-dihexyl-9H-fluorene (CAS 187148-75-0)
- 1-(Bromomethyl)-3,5-didodecylbenzene (CAS 2196162-58-8)
Recommended Standards
- Methyl 4-(4-{[3-chloro-5-(trifluoromethyl)pyridin-2-yl]methyl}phenoxy)-6-oxo-1-phenyl-1,6-dihydropyridazine-3-carboxylate (CAS 339020-38-1)
- BDT-2Sn (CAS 1242077-07-1)
- 1-(5-Chloro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1-tosyl-1H-indol-3-yl)-2,2-dimethylpropan-1-one (CAS 2390149-39-8)
- 1,2-Bis(5-(trimethylstannyl)thiophen-2-yl)ethyne (CAS 1610057-24-3)
- Boc-N-Me-Cys(Mob)-OH (CAS 135747-89-6)
- 4-Amino-6-bromo-5-(difluoromethyl)picolinic acid (CAS 1806813-67-1)
- 2-(((4-Cyclohexylphenyl)amino)methyl)-4-iodo-6-methoxyphenol (CAS 763130-41-2)
- Levocetirizine Impurity 9 (CAS CATO-C4X-10839)
- 2-Chloro-6-(benzylsulfanyl)-4-(trifluoromethyl)pyridine (CAS 1303889-57-7)
- 2-((1H-Indol-3-yl)oxy)-N-methylethanamine (CAS 775516-65-9)
- N4-(5,8-Dimethoxy-2-methylquinolin-6-yl)-N1,N1-diethylpentane-1,4-diamine (CAS 36783-36-5)
- 2-(2,6-Difluoro-4-nitrophenyl)propanoic Acid (CAS 1226776-82-4)
- Atrasentan Impurity 21 (CAS 1058392-86-1)
- Semaglutide Impurity 184 (CAS CATO-C4X-2226184)
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