Meropenem Impurity 16 CAS 137391-68-5
| CAS No. | 137391-68-5 |
| Molecular Formula | C17H18N4O7 |
| Molecular Weight | 390.35 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.
Meropenem Impurity 16 (CAS 137391-68-5) is a certified pharmaceutical impurity reference standard with the molecular formula C17H18N4O7 and a molecular weight of 390.35 g/mol.
The molecular framework of Meropenem Impurity 16 (C17H18N4O7) is characterized by a flavonoid core, an amide 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C17H18N4O7 |
| Molecular Weight | 390.35 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1996 |
| Nitrogen Atoms | 4 |
Related Meropenem Standards
- Meropenem-d6 (CAS 1217976-95-8)
- Meropenem Impurity 11 (CAS CATO-C4X-130911)
- Meropenem (CAS 96036-03-2)
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- 7-Methyl-2,5,7-triazaspiro[3.4]octane-6,8-dione hydrochloride (CAS 2436296-66-9)
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