Aztreonam impurity 55 CAS CATO-C4X-152255
| CAS No. | CATO-C4X-152255 |
| Molecular Formula | C15H23N5O6S |
| Molecular Weight | 401.44 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, Aztreonam impurity 55 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 401.44 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
Aztreonam impurity 55 (CAS CATO-C4X-152255) is a certified pharmaceutical impurity reference standard with the molecular formula C15H23N5O6S and a molecular weight of 401.44 g/mol.
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 | C15H23N5O6S |
| Molecular Weight | 401.44 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 1 |
Related Aztreonam Standards
- Aztreonam Impurity 47 (CAS CATO-C4X-152247)
- Aztreonam Impurity 52 (CAS CATO-C4X-152252)
- Aztreonam Impurity 18 (CAS CATO-C4X-152218)
- Aztreonam impurity 110 (CAS 1255912-99-2)
- Aztreonam impurity 120 (CAS CATO-C4X-1522120)
- Aztreonam USP RC B(Open-ring Desulfated Aztreonam) (CAS 102586-36-7)
- Aztreonam Impurity 43 (CAS CATO-C4X-152243)
- Aztreonam impurity 65 (CAS CATO-C4X-152265)
Recommended Standards
- Open-ring Desulfated Aztreonam Ethyl Ester 2 (CAS CATO-C4X-152237)
- N-Nitroso-Urapidil (CAS CATO-C4X-192499)
- Open-ring Desulfated Aztreonam Ethyl Ester 3 (CAS CATO-C4X-1522122)
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- Labetalol Impurity 57 (CAS CATO-C4X-246657)
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