Amoxicillin EP Impurity E CAS 1356020-01-3
| CAS No. | 1356020-01-3 |
| Molecular Formula | C15H21N3O4S |
| Molecular Weight | 339.41 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Amoxicillin EP Impurity E (CAS 1356020-01-3) is a certified pharmaceutical impurity reference standard with the molecular formula C15H21N3O4S and a molecular weight of 339.41 g/mol.
Based on its molecular formula C15H21N3O4S, Amoxicillin EP Impurity E 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 339.41 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
Physical & Chemical Properties
| Molecular Formula | C15H21N3O4S |
| Molecular Weight | 339.41 g/mol |
| Purity | >90%200mg |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Amoxicillin Standards
- Amoxicillin EP Impurity E-1 (CAS CATO-C4X-114872)
- Amoxicillin EP Impurity E-2 (CAS CATO-C4X-114873)
- Amoxicillin EP Impurity C (CAS 2088961-37-7)
- Amoxicillin impurity 103 (CAS 94659-47-9)
- Amoxicillin impurity 113 (CAS CATO-C4X-1148113)
- Amoxicillin EP impurity B (CAS 26889-93-0)
- Amoxicillin (CAS 26787-78-0)
- Amoxicillin-13C2,15N (Mixture of Diastereomers) (CAS 1357002-99-3)
Recommended Standards
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- Carpalasionin (CAS 83150-97-4)
- 2-Methyl-2-(4-(trifluoromethyl)phenyl)propanoic acid (CAS 32445-89-9)
- 5'-O-Dimethoxytrityl-N4-Benzoyl-cytidine (CAS 41092-41-5)
- Tert-butyl (6S,9aR)-6-methyloctahydro-2H-pyrazino[1,2-a]pyrazine-2-carboxylate (CAS 2506407-44-7)
- 2-(2-Bromo-3-fluorophenyl)-2-hydroxyacetic acid (CAS 1214391-36-2)
- Insulin Degludec Impurity 11 (CAS CATO-C4X-215711)
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