Ceftazidime Impurity 98 CAS CATO-C4X-121298
| CAS No. | CATO-C4X-121298 |
| Molecular Formula | C33H39N7O13S3 |
| Molecular Weight | 837.90 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 837.90 g/mol gives Ceftazidime Impurity 98 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies Ceftazidime Impurity 98 (CAS CATO-C4X-121298), a pharmacopoeial impurity reference standard (molecular formula C33H39N7O13S3, MW 837.90 g/mol) used for the identification and quantification of trace impurities in APIs.
The molecular framework of Ceftazidime Impurity 98 (C33H39N7O13S3) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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 | C33H39N7O13S3 |
| Molecular Weight | 837.90 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) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 7 |
| Sulfur Atoms | 3 |
Related Ceftazidime Standards
- Ceftazidime Impurity D (CAS CATO-C4X-12124)
- Ceftazidime Impurity 14 (CAS CATO-C4X-121214)
- Ceftazidime Impurity 55 (CAS CATO-C4X-121255)
- Ceftazidime Impurity 99 (CAS CATO-C4X-121299)
- Ceftazidime impurity 124 (CAS CATO-C4X-1212124)
- Ceftazidime Impurity 101 (CAS CATO-C4X-1212101)
- Ceftazidime Impurity 75 (CAS CATO-C4X-121275)
- Ceftazidime Impurity 31 (CAS CATO-C4X-121231)
Recommended Standards
- 2,3,4,6-Tetra-O-(2-naphthoyl)-beta-D-galactopyranosyl isothiocyanate (CAS 957509-30-7)
- N-Demethyl-N-Nitroso Rifampicin (CAS CATO-C4X-145610)
- Blood group A pentasaccharide (CAS 50624-46-9)
- N-Nitroso N-Desmethyl Rifampicin (CAS CATO-C4X-145615)
- Valnemulin EP Impurity C (CAS CATO-C4X-19993)
- Diprophylline Impurity 5 (CAS CATO-C4X-24405)
- Butylphthalide Impurity 36 (CAS 2245275-82-3)
- 2-Chloro-4-(1-ethoxyvinyl)-5H-pyrrolo[3,2-d]pyrimidine (CAS 2137952-06-6)
- 1-(4-Methoxyphenyl)-3-(prop-2-en-1-yl)thiourea (CAS 1138-72-3)
- 5-Bromo-3-methyl-2-nitropyridine (CAS 114042-02-3)
- 1-(3-Chloro-2-methylphenyl)-5-phenyl-1H-imidazole-2-thiol (CAS 852217-72-2)
- 3-(4-methoxyphenyl)-3-oxopropanamide (CAS CATO-C3D-263105)
- 6-fluoroquinazoline-4-carboxylic acid (CAS 1781315-63-6)
- HA Peptide (CAS 92000-76-5)
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