Cefmenoxime Impurity 3 CAS 126747-52-2
| CAS No. | 126747-52-2 |
| Molecular Formula | C16H17N9O5S3 |
| Molecular Weight | 511.56 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Cefmenoxime Impurity 3 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.
CATO supplies Cefmenoxime Impurity 3 (CAS 126747-52-2), a pharmacopoeial impurity reference standard (molecular formula C16H17N9O5S3, MW 511.56 g/mol) used for the identification and quantification of trace impurities in APIs.
Cefmenoxime Impurity 3 (C16H17N9O5S3) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C16H17N9O5S3 |
| Molecular Weight | 511.56 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 |
| CAS Registry Year (est.) | 1993 |
| Nitrogen Atoms | 9 |
| Sulfur Atoms | 3 |
Related Cefmenoxime Standards
- Cefmenoxime Impurity 2 (CAS 66340-45-2)
- Cefmenoxime Impurity 6 (CAS CATO-C4X-14776)
- Cefmenoxime Impurity 11 (CAS CATO-C4X-147711)
- Cefmenoxime Impurity 10 (CAS CATO-C4X-147710)
- Cefmenoxime Impurity 5 (CAS CATO-C4X-14775)
- Cefmenoxime Impurity 4 (CAS CATO-C4X-14774)
- Cefmenoxime Impurity 40 (CAS 21566-74-5)
- Cefmenoxime Impurity 13 (CAS CATO-C4X-147713)
Recommended Standards
- Azido-PEG9-acid (CAS 1670249-37-2)
- Delta-2-Cefetamet Pivoxil (CAS 126617-54-7)
- 7-((3-Nitrophenyl)((4-(phenylsulfonyl)phenyl)amino)methyl)quinolin-8-ol (CAS 64845-56-3)
- 4'-(3,5-Bis(pyridin-4-ylethynyl)phenyl)-2,2':6',2''-terpyridine (CAS 1478039-72-3)
- Bisoprolol Impurity 92 (CAS CATO-C4X-124792)
- Daptomycin Impurity 40 (CAS CATO-C4X-137840)
- Gadopiclenol Impurity 3 (CAS 2410182-15-7)
- cis-hexahydro-1H-thieno[3,4-c]pyrrole hydrochloride (CAS 179339-70-9)
- 4-Aminobicyclo[2.1.1]Hexane-1-carbonitrile hydrochloride (CAS 2170371-94-3)
- 3-Methyl-2-(3-methylphenyl)butanenitrile (CAS 120352-95-6)
- 3-(((8-Acetamidoquinolin-5-yl)sulfonyl)methyl)phenyl acetate (CAS 88606-53-5)
- 2,4-Dichloro-N-(1-(2,6-dichlorobenzyl)-2-oxo-1,2-dihydropyridin-3-yl)benzamide (CAS 338784-07-9)
- Methyl 2-methoxy-4-(4-methoxybenzenesulfonamido)benzoate (CAS 383148-37-6)
- Hexapeptide-11 (CAS 161258-30-6)
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