(2,5-Dichloro-1,4-phenylene)bis(phenylmethanone) CAS 233744-25-7
| CAS No. | 233744-25-7 |
| Molecular Formula | C20H12Cl2O2 |
| Molecular Weight | 355.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
(2,5-Dichloro-1,4-phenylene)bis(phenylmethanone) (CAS 233744-25-7), molecular formula C20H12Cl2O2 and molecular weight 355.21 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, (2,5-Dichloro-1,4-phenylene)bis(phenylmethanone) (C20H12Cl2O2) contains a steroid core, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 14.0, corresponding to approximately 14 ring(s) or double-bond equivalent(s). With a molecular weight of 355.21 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
As a certified reference material (CRM), (2,5-Dichloro-1,4-phenylene)bis(phenylmethanone) 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.
Physical & Chemical Properties
| Molecular Formula | C20H12Cl2O2 |
| Molecular Weight | 355.21 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| 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) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2023 |
| Halogen Content | Cl-containing |
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- Tert-butyl (2-amino-2-(3-bromophenyl)ethyl)carbamate (CAS 1086392-07-5)
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- 2-(Benzylthio)-5-bromopyrimidin-4(3H)-one (CAS 125154-07-6)
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