Ampicillin EP Impurity C(Isomeric mixture 2) CAS CATO-C4X-144318
| CAS No. | CATO-C4X-144318 |
| Molecular Formula | C16H19N3O4S |
| Molecular Weight | 349.40 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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 process- or degradation-related impurity, Ampicillin EP Impurity C(Isomeric mixture 2) (CAS CATO-C4X-144318, C16H19N3O4S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
The molecular framework of Ampicillin EP Impurity C(Isomeric mixture 2) (C16H19N3O4S) is characterized by a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. 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).
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 | C16H19N3O4S |
| Molecular Weight | 349.40 g/mol |
| Purity | >90% |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Ampicillin Standards
- Ampicillin Impurity 100 (CAS CATO-C4X-1443100)
- Ampicillin EP Impurity B (CAS 19379-33-0)
- Ampicillin EP Impurity C(Isomeric mixture1) (CAS CATO-C4X-14433)
- Ampicillin Trihydrate EP Impurity N (CAS CATO-C4X-144353)
- Ampicillin Impurity 98 (CAS 49841-96-5)
- Ampicillin (CAS 69-53-4)
- Ampicillin Impurity 46 (CAS CATO-C4X-144346)
- Ampicillin impurity 65 (CAS 55675-51-9)
Recommended Standards
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Why CATO?
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