Ceftazidime EP Impurity G CAS 194241-83-3
| CAS No. | 194241-83-3 |
| Molecular Formula | C11H14N4O5S |
| Molecular Weight | 314.32 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Ceftazidime EP Impurity G 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 Ceftazidime EP Impurity G (CAS 194241-83-3), a pharmacopoeial impurity reference standard (molecular formula C11H14N4O5S, MW 314.32 g/mol) used for the identification and quantification of trace impurities in APIs.
Ceftazidime EP Impurity G (C11H14N4O5S) 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 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.
Physical & Chemical Properties
| Molecular Formula | C11H14N4O5S |
| Molecular Weight | 314.32 g/mol |
| Purity | >90% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2012 |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
Related Ceftazidime Standards
- Ceftazidime Impurity 91 (CAS CATO-C4X-121291)
- Ceftazidime Impurity 85 (CAS CATO-C4X-121285)
- Ceftazidime Impurity 82 (CAS CATO-C4X-121282)
- Ceftazidime Impurity 58 (CAS CATO-C4X-121258)
- Ceftazidime Impurity 16 (CAS 86299-47-0)
- Ceftazidime Impurity 46 (CAS 134203-50-2)
- Ceftazidime Impurity 89 (CAS CATO-C4X-121289)
- Ceftazidime EP Impurity C (CAS 3432-88-0)
Recommended Standards
- Methyl 3-(4-picolinoyl-1H-1,2,3-triazol-1-yl)thiophene-2-carboxylate (CAS 691869-08-6)
- 6-Methoxy-2-(2,3,4-trimethoxyphenyl)benzofuran (CAS 10141-44-3)
- BML-288 (CAS 851681-89-5)
- 5-Oxo-5-(3-oxo-2-(2-oxo-2-propoxyethyl)piperazin-1-yl)pentanoic acid (CAS 1024712-81-9)
- Phentolamine Mesilate Impurity 6 (CAS 13338-49-3)
- Amlodipine Impurity 145 fumarate (CAS 88150-53-2)
- Norepinephrine Impurity 156 (CAS CATO-C4X-1514156)
- 3-Cyclopropoxy-5-iodo-4-methoxypyridine (CAS 1243367-89-6)
- BenzoylmesaconineHydrochloride (CAS 126266-38-4)
- 6-Methyl-2H-pyran-2,4(3H)-dione (CAS 541-98-0)
- 2,6,6-Trimethyl-2-cyclohexene-1-acetic acid (CAS 472-67-3)
- 2-Methyl-1-(2,2,2-trifluoroethyl)-1h-benzo[d]imidazole-4-carboxylic acid (CAS 1553562-87-0)
- (R)-1-(4-Amino-2-(hydroxymethyl)phenyl)pyrrolidin-3-ol (CAS 921592-82-7)
- Acetyl Tetrapeptide-11 (CAS 928006-88-6)
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