Ceftazidime Impurity 22 CAS CATO-C4X-121222
| CAS No. | CATO-C4X-121222 |
| Molecular Formula | C44H42N12O13S4 |
| Molecular Weight | 1075.14 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Ceftazidime Impurity 22 (CAS CATO-C4X-121222), a pharmacopoeial impurity reference standard (molecular formula C44H42N12O13S4, MW 1075.14 g/mol) used for the identification and quantification of trace impurities in APIs.
Ceftazidime Impurity 22 (C44H42N12O13S4) contains a nitrogen-containing heterocyclic scaffold, 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.
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 | C44H42N12O13S4 |
| Molecular Weight | 1075.14 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) | 30.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 12 |
| Sulfur Atoms | 4 |
Related Ceftazidime Standards
- Ceftazidime Impurity 94 (CAS CATO-C4X-121294)
- Ceftazidime Impurity 54 (CAS CATO-C4X-121254)
- Ceftazidime Impurity 21 (CAS CATO-C4X-121221)
- Ceftazidime Impurity 33 (CAS CATO-C4X-121233)
- Ceftazidime dimer 2 (CAS CATO-C4X-121265)
- Ceftazidime Impurity 53 (CAS CATO-C4X-121253)
- Ceftazidime dimer derivative 1 (CAS CATO-C4X-121267)
- Ceftazidime dimer derivative 2 (CAS CATO-C4X-121268)
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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