N-Nitroso Azithromycin Impurity 46 CAS CATO-C4X-100346
| CAS No. | CATO-C4X-100346 |
| Molecular Formula | C37H69N3O13 |
| Molecular Weight | 763.96 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C37H69N3O13, N-Nitroso Azithromycin Impurity 46 contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 763.96 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).
CATO supplies N-Nitroso Azithromycin Impurity 46 (CAS CATO-C4X-100346), a pharmacopoeial impurity reference standard (molecular formula C37H69N3O13, MW 763.96 g/mol) used for the identification and quantification of trace impurities in APIs.
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.
As a certified reference material (CRM), N-Nitroso Azithromycin Impurity 46 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C37H69N3O13 |
| Molecular Weight | 763.96 g/mol |
| Purity | >90% |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 3 |
Related N Standards
- N-Nitroso Azithromycin Impurity 48 (CAS CATO-C4X-100348)
- N-Nitroso Azithromycin Impurity 54 (CAS CATO-C4X-100354)
- N-Nitroso-N-Desmethyl Clarithromycin (CAS CATO-C4X-100226)
- N-Nitroso Clarithromycin-13C D3 (CAS CATO-C4X-100233)
- N-Nitroso Amoxicillin Impurity J Dimer (CAS CATO-C4X-114878)
- N-Nitroso Amoxicillin Impurity K (CAS CATO-C4X-114880)
- N-Nitroso Erythromycin EP Impurity B (CAS CATO-C4X-100151)
- N-Nitroso Erythromycin impurity 57 (CAS CATO-C4X-100157)
Recommended Standards
- (Pyr6,Pro9)-Substance P (6-11) (CAS 79775-19-2)
- (14R)-Hydroxy Clarithromycin (CAS 116836-41-0)
- Clarithromycin Impurity 20 (CAS 118074-07-0)
- Azithromycin impurity 57 (CAS CATO-C4X-100357)
- Ketoprofen Impurity 44 (CAS 131019-17-5)
- Brexpiprazole Impurity 65 (CAS 2247155-48-0)
- Apixaban Impurity 69 (CAS CATO-C4X-108869)
- (5-(1,3-Dioxolan-2-yl)thiophen-2-yl)(2-fluorophenyl)methanone (CAS 898773-35-8)
- Ethyl 7-fluoro-3-hydroxybenzo[b]thiophene-2-carboxylate (CAS 2089963-64-2)
- (2S,3S)-Methyl 3-hydroxy-5-oxopyrrolidine-2-carboxylate (CAS 26367-35-1)
- 2-Phenyl-4-pentyn-2-ol (CAS 6712-35-2)
- 1-Amino-3-(4-bromo-1h-pyrazol-1-yl)cyclopentane-1-carboxylic acid (CAS 1539705-31-1)
- 2-(Phenylamino)quinolin-8-ol (CAS 70125-22-3)
- (Leu31,Pro34)-Peptide YY (human) trifluoroacetate salt (CAS 179986-95-9)
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