(4S,4′S)-2,2′-Bis(2,6-dichlorophenyl)-4,4′,5,5′-tetrahydro-4,4′-bioxazole CAS 263752-11-0
| CAS No. | 263752-11-0 |
| Molecular Formula | C18H12Cl4N2O2 |
| Molecular Weight | 430.11 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including (4S,4′S)-2,2′-Bis(2,6-dichlorophenyl)-4,4′,5,5′-tetrahydro-4,4′-bioxazole.
(4S,4′S)-2,2′-Bis(2,6-dichlorophenyl)-4,4′,5,5′-tetrahydro-4,4′-bioxazole (CAS 263752-11-0), molecular formula C18H12Cl4N2O2 and molecular weight 430.11 g/mol, is a CATO reference standard with documented purity and traceability.
(4S,4′S)-2,2′-Bis(2,6-dichlorophenyl)-4,4′,5,5′-tetrahydro-4,4′-bioxazole (C18H12Cl4N2O2) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C18H12Cl4N2O2 |
| Molecular Weight | 430.11 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Recommended Standards
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