Ertapenem Impurity 4 CAS CATO-C4X-16334
| CAS No. | CATO-C4X-16334 |
| Molecular Formula | C25H29N3O7S |
| Molecular Weight | 515.58 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Ertapenem Impurity 4 (CAS CATO-C4X-16334) is a certified pharmaceutical impurity reference standard with the molecular formula C25H29N3O7S and a molecular weight of 515.58 g/mol.
Based on its molecular formula C25H29N3O7S, Ertapenem Impurity 4 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 515.58 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.
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 | C25H29N3O7S |
| Molecular Weight | 515.58 g/mol |
| Purity | 97%+ |
| 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 |
| Degree of Unsaturation (DBE) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Ertapenem Standards
- Ertapenem Impurity 6 (CAS CATO-C4X-16336)
- Ertapenem Impurity N6 (CAS 866186-68-7)
- Ertapenem Impurity 15 (CAS CATO-C4X-163315)
- Ertapenem Impurity 22 (CAS CATO-C4X-163322)
- Ertapenem Impurity 54 (CAS CATO-C4X-163354)
- Ertapenem Impurity 63 (CAS CATO-C4X-163363)
- Ertapenem Impurity 37 (CAS CATO-C4X-163337)
- Ertapenem Impurity 18 (CAS CATO-C4X-163318)
Recommended Standards
- Azido-PEG3-Sulfone-PEG4-acid (CAS 2055024-42-3)
- N-Benzyl-N-bis(PEG3-acid) (CAS 2093154-03-9)
- (S)-5-(8,9,10,11,12,13,14,15-Octahydrodinaphtho[2,1-d:1',2'-f][1,3,2]dioxaphosphepin-4-yl)-5H-dibenzo[b,f]azepine (CAS 2543900-12-3)
- (S,R)-In-Tox (CAS 1239015-11-2)
- Tolterodine Impurity 1 (CAS 40546-94-9)
- Palbociclib Impurity 108 (CAS CATO-C4X-1125108)
- Cefpodoxime Impurity 50 (CAS CATO-C4X-157950)
- Methyl 2-(6-((tert-butoxycarbonyl)amino)pyridin-2-yl)acetate (CAS 1260879-98-8)
- N-([1,1':3',1''-terphenyl]-5'-yl)-9,9-dimethyl-9h-fluoren-2-amine (CAS 1372778-68-1)
- Methyl({[2-(methylsulfanyl)phenyl]methyl})amine (CAS 866781-87-5)
- 5-Methyl-3-((piperidin-3-yloxy)methyl)-1,2,4-oxadiazole (CAS 1249693-46-6)
- Chroman-6-ylboronic acid (CAS 279261-84-6)
- (R)-2-(3-(tert-Butoxycarbonylamino)-2-oxopiperidin-1-yl)acetic acid (CAS 82611-51-6)
- Peptide Impurity 13 (CAS CATO-CPTD788813)
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