Dextromethorphan EP Impurity B CAS 125-73-5
| CAS No. | 125-73-5 |
| Molecular Formula | C17H23NO |
| Molecular Weight | 257.37 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Dextromethorphan EP Impurity B (CAS 125-73-5) is a certified pharmaceutical impurity reference standard with the molecular formula C17H23NO and a molecular weight of 257.37 g/mol.
Based on its molecular formula C17H23NO, Dextromethorphan EP Impurity B contains a steroid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 257.37 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
As a certified reference material (CRM), Dextromethorphan EP Impurity B 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 | C17H23NO |
| Molecular Weight | 257.37 g/mol |
| Purity | >90% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 1 |
Related Dextromethorphan Standards
- Dextromethorphan EP Impurity A (CAS 1531-23-3)
- Dextromethorphan Impurity 16 (CAS 30356-07-1)
- Dextromethorphan Impurity 17 (CAS 30356-08-2)
- Dextromethorphan Impurity 32 (CAS 51072-36-7)
- Dextromethorphan Impurity 31 (CAS 23974-90-5)
- Dextromethorphan impurity 23 (CAS 125-70-2)
- Dextromethorphan EP Impurity D (CAS 1453167-99-1)
- (6aS)-Dextromethorphan Impurity 9 (CAS CATO-C4X-11579)
Recommended Standards
- Dimemorfan Phosphate Impuirity (CAS CATO-C4X-33581)
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- Ethyl 2-(4-methylphenyl)-thiazole-4-carboxylate (CAS 132089-32-8)
- Decitabine Impurity 25 (CAS 1034301-08-0&1140891-02-6)
- Carfilzomib Impurity 38 (Mixture of Diastereomers) (CAS CATO-C4X-102238)
- Isavuconazole Impurity 223 (CAS CATO-C4X-1236223)
- Cyproterone Acetate EP Impurity D (CAS CATO-C4X-16012)
- MDMA-d3 Hydrochloride (1.0mg/ml in Acetonitrile) (CAS 1219794-60-1)
- N,N,4-trimethyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzamide (CAS 960308-92-3)
- (4-Methoxy Phenyl) Hydroquinone (CAS 59007-04-4)
- Folic Acid Impurity 22 (CAS 921-03-9)
- Isosorbide Impurity 23 (CAS 45895-44-1)
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Why CATO?
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