Azithromycin impurity 58 CAS CATO-C4X-100358
| CAS No. | CATO-C4X-100358 |
| Molecular Formula | C39H76N2O12 |
| Molecular Weight | 765.03 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Azithromycin impurity 58 is closely related to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Azithromycin impurity 58 (CAS CATO-C4X-100358) is a certified pharmaceutical impurity reference standard with the molecular formula C39H76N2O12 and a molecular weight of 765.03 g/mol.
Based on its molecular formula C39H76N2O12, Azithromycin impurity 58 contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 765.03 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).
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.
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 | C39H76N2O12 |
| Molecular Weight | 765.03 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) | 3.0 |
| UV Absorption | UV-absorbing |
| Nitrogen Atoms | 2 |
Related Azithromycin Standards
- Azithromycin EP Impurity L (CAS 90503-06-3)
- Azithromycin EP Impurity D (CAS 612069-26-8)
- Azithromycin impurity 57 (CAS CATO-C4X-100357)
- Azithromycin Impurity 45 (CAS 2365312-75-8)
- Azithromycin EP Impurity O (CAS 763924-54-5)
- Azithromycin N-Ethyl (CAS 92594-45-1)
- Azithromycin EP Impurity K (CAS 612534-95-9)
- Azithromycin EP Impurity F (CAS 612069-28-0)
Recommended Standards
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