Oxacillin EP Impurity D CAS 1642559-63-4
| CAS No. | 1642559-63-4 |
| Molecular Formula | C18H21N3O4S |
| Molecular Weight | 375.44 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| 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 Oxacillin EP Impurity D.
Oxacillin EP Impurity D (CAS 1642559-63-4) is a certified pharmaceutical impurity reference standard with the molecular formula C18H21N3O4S and a molecular weight of 375.44 g/mol.
Based on its molecular formula C18H21N3O4S, Oxacillin EP Impurity D contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 375.44 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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), Oxacillin EP Impurity D 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 | C18H21N3O4S |
| Molecular Weight | 375.44 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°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 |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1993 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Oxacillin Standards
- Oxacillin Impurity 46 (CAS CATO-C4X-232146)
- Oxacillin Impurity 18 (CAS CATO-C4X-232118)
- Oxacillin Impurity 29 (CAS CATO-C4X-232129)
- Oxacillin Impurity 50 (CAS CATO-C4X-232150)
- Oxacillin Impurity 58 (CAS CATO-C4X-232158)
- Oxacillin Impurity 65 (CAS CATO-C4X-232165)
- Oxacillin Impurity 1 (CAS CATO-C4X-23211)
- Oxacillin Impurity 14 (CAS CATO-C4X-232114)
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