Cefpodoxime Proxetil EP Impurity C CAS 339528-86-8
| CAS No. | 339528-86-8 |
| Molecular Formula | C21H27N5O9S2 |
| Molecular Weight | 557.60 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Cefpodoxime Proxetil EP Impurity C under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
CATO supplies Cefpodoxime Proxetil EP Impurity C (CAS 339528-86-8), a pharmacopoeial impurity reference standard (molecular formula C21H27N5O9S2, MW 557.60 g/mol) used for the identification and quantification of trace impurities in APIs.
Cefpodoxime Proxetil EP Impurity C (C21H27N5O9S2) 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. 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.
Physical & Chemical Properties
| Molecular Formula | C21H27N5O9S2 |
| Molecular Weight | 557.60 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 2 |
Related Cefpodoxime Standards
- Cefpodoxime Proxetil (CAS 87239-81-4)
- Cefpodoxime Proxetil EP Impurity D (CAS 947692-13-9)
- Cefpodoxime Proxetil EP Impurity C (CAS CATO-C4X-157944)
- Cefpodoxime Proxetil EP Impurity D (CAS CATO-C4X-157945)
- Cefpodoxime Proxetil Impurity 5 (CAS 82619-01-0)
- Cefpodoxime Proxetil Impurity 22 (CAS CATO-C4X-157922)
- Cefpodoxime Impurity 49 (CAS CATO-C4X-157949)
- Cefpodoxime Proxetil Impurity 10 (CAS CATO-C4X-157910)
Recommended Standards
- Valaciclovir Impurity 56 (CAS CATO-C4X-124856)
- Olmesartan Impurity 75 (CAS 1048948-20-4)
- Dabigatran Impurity 23 (CAS 211914-96-4)
- Mezlocillin Impurity 15 (CAS CATO-C4X-183115)
- Posaconazole impurity 240 (CAS CATO-C4X-1208240)
- Menaquinone impurity 26 (CAS CATO-C4X-207626)
- Betamethasone Acetate EP Impurity D (CAS 912-38-9)
- (S)-3-(4-Bromophenoxy)butanoic acid (CAS 1416444-67-1)
- N-(3-(1-Butyryl-5-(furan-2-yl)-4,5-dihydro-1H-pyrazol-3-yl)phenyl)ethanesulfonamide (CAS 927145-39-9)
- 2-(4-Bromo-1H-pyrazol-3-yl)acetic acid (CAS 1378260-38-8)
- (2R,3R,4S,5R,6S)-2-(Acetoxymethyl)-6-(((3aS,4R,7R,8R,8aS)-2,2-dimethylhexahydro-4,7-epoxy[1,3]dioxolo[4,5-c]oxepin-8-yl)oxy)tetrahydro-2H-pyran-3,4,5-triyl triacetate (CAS 5346-69-0)
- (E)-3-(Naphthalen-2-yl)prop-2-en-1-ol (CAS 114833-07-7)
- (4-Amino-2,5-difluorophenyl)boronic acid (CAS 1383385-96-3)
- Semaglutide impurity 81 (CAS CATO-C4X-222681)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com