Ceftazidime Impurity 40 CAS CATO-C4X-121240
| CAS No. | CATO-C4X-121240 |
| Molecular Formula | C17H19N5O7S2 |
| Molecular Weight | 469.49 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Ceftazidime Impurity 40 (CAS CATO-C4X-121240) is a certified pharmaceutical impurity reference standard with the molecular formula C17H19N5O7S2 and a molecular weight of 469.49 g/mol.
Based on its molecular formula C17H19N5O7S2, Ceftazidime Impurity 40 contains a flavonoid core, 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 469.49 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
As a certified reference material (CRM), Ceftazidime Impurity 40 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 | C17H19N5O7S2 |
| Molecular Weight | 469.49 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 2 |
Related Ceftazidime Standards
- Ceftazidime Impurity 13 (CAS 1301254-50-1)
- Ceftazidime Impurity C68 (CAS 179258-52-7)
- Ceftazidime Impurity 73 (CAS CATO-C4X-121273)
- Ceftazidime Impurity 20 (CAS CATO-C4X-121220)
- Ceftazidime Impurity 23 (CAS 158183-05-2)
- Ceftazidime Impurity 51 (CAS CATO-C4X-121251)
- Ceftazidime impurity 123 (CAS CATO-C4X-1212123)
- Ceftazidime Impurity C07 (CAS 752152-44-6)
Recommended Standards
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- Gadoteridol impurity 32 (CAS CATO-C4X-225732)
- Roxadustat Impurity 150 (CAS CATO-C4X-2213150)
- Iohexol Impurity 28 (CAS 92339-10-1)
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- tert-Butyl 2-vinylpyrrolidine-1-carboxylate (CAS 176324-60-0)
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- (S)-4-nitro-1-(tetrahydrofuran-3-yl)-1h-pyrazole (CAS 1805813-36-8)
- 4-Amino-1-methyl-1H-pyrrole-2-carboxamide (CAS 949485-61-4)
- Thymalfasin (CAS 69440-99-9)
- Strontium bromide hexahydrate (CAS 7789-53-9)
- Tau Peptide (301-315) trifluoroacetate salt (CAS 330456-48-9)
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