Ceftazidime EP Impurity C CAS 3432-88-0
| CAS No. | 3432-88-0 |
| Molecular Formula | C13H13N3O3S |
| Molecular Weight | 291.33 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Ceftazidime EP Impurity C.
Ceftazidime EP Impurity C (CAS 3432-88-0) is a certified pharmaceutical impurity reference standard with the molecular formula C13H13N3O3S and a molecular weight of 291.33 g/mol.
Based on its molecular formula C13H13N3O3S, Ceftazidime EP Impurity C contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 291.33 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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), Ceftazidime EP Impurity C 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 | C13H13N3O3S |
| Molecular Weight | 291.33 g/mol |
| Purity | >90% |
| Storage | Store at 2-8°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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Ceftazidime Standards
- Ceftazidime Impurity 80 (CAS CATO-C4X-121280)
- Ceftazidime Impurity 95 (CAS CATO-C4X-121295)
- Ceftazidime Impurity 45 (CAS 2647895-27-8)
- Ceftazidime Impurity 34 (CAS 72820-16-7)
- Ceftazidime Impurity 82 (CAS CATO-C4X-121282)
- Ceftazidime Impurity 91 (CAS CATO-C4X-121291)
- Ceftazidime Impurity 38 Mixture (CAS 91999-75-6)
- Ceftazidime Impurity 26 (CAS CATO-C4X-121226)
Recommended Standards
- tert-Butyl (4,4-difluoro-1-oxaspiro[4.5]decan-8-yl)carbamate (CAS 2770344-61-9)
- tert-Butyl (3,4-difluoro-1-oxaspiro[4.5]decan-8-yl)carbamate (CAS 2770345-73-6)
- N1-(2-hydroxyethyl)-N2-(4-phenylthiazol-2-yl)oxalamide (CAS 316360-24-4)
- Torasemide Impurity 23 (CAS CATO-C4X-183623)
- Oxymetazoline Impurity 13 (CAS CATO-C4X-172313)
- Tofacitinib Impurity 215 (CAS CATO-C4X-1079215)
- Flurbiprofen Impurity 117 (CAS CATO-C4X-1444117)
- (2,3-Dihydroxy-5-((2S,3R,4R,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)benzoyl)-L-serine (CAS 768386-88-5)
- 2-(4-Chlorobenzamido)benzoic acid (CAS 34425-87-1)
- Angiogenin Fragment (108-122) (CAS 112173-49-6)
- Flupirtine maleate (CAS 75507-68-5)
- 2-(bromomethyl)-1-chloro-4-nitrobenzene 2-Chloro-5-nitrobenzylbromide 52427-01-7 A21486 (CAS 52427-01-7)
- 8-Chloroquinolin-3-amine hydrochloride (CAS 1207187-33-4)
- Semaglutide Impurity 4 (CAS CATO-C4X-22264)
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