Oxacillin EP Impurity G CAS CATO-C4X-232121
| CAS No. | CATO-C4X-232121 |
| Molecular Formula | C19H18ClN3O5S |
| Molecular Weight | 435.88 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Oxacillin EP Impurity G (CAS CATO-C4X-232121) is a certified pharmaceutical impurity reference standard with the molecular formula C19H18ClN3O5S and a molecular weight of 435.88 g/mol.
The molecular framework of Oxacillin EP Impurity G (C19H18ClN3O5S) is characterized by a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 G 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 | C19H18ClN3O5S |
| Molecular Weight | 435.88 g/mol |
| Purity | >95% |
| 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 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Oxacillin Standards
- Oxacillin EP Impurity G (CAS 724695-30-1)
- Oxacillin Impurity 52 (CAS CATO-C4X-232152)
- Oxacillin Impurity 56 (CAS CATO-C4X-232156)
- Oxacillin Impurity 12 (CAS CATO-C4X-232112)
- Oxacillin Impurity 45 (CAS CATO-C4X-232145)
- Oxacillin dioxamide (CAS CATO-C4X-232130)
- Oxacillin Impurity 44 (CAS CATO-C4X-232144)
- Oxacillin Impurity 3 (CAS CATO-C4X-23213)
Recommended Standards
- Cloxacillin Impurity 37 (CAS CATO-C4X-159737)
- Cloxacillin Impurity 32 (CAS CATO-C4X-159732)
- Rivaroxaban Impurity 95 (CAS CATO-C4X-109095)
- Ethyl 2-(3-(tert-butyl)-2-((2-chloro-5-(trifluoromethyl)phenyl)imino)-3,4-dihydro-2h-1,3,4-thiadiazin-5-yl)acetate (CAS 560995-30-4)
- Suvorexant Impurity 46 (CAS CATO-C4X-181246)
- Sivelestat Impurity 20 (CAS 1842-55-3)
- Apixaban Impurity 183 (CAS CATO-C4X-1088183)
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