Ceftazidime Impurity C68 CAS 179258-52-7
| CAS No. | 179258-52-7 |
| Molecular Formula | C17H28N3O8PS |
| Molecular Weight | 465.46 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 C68 (CAS 179258-52-7) is a certified pharmaceutical impurity reference standard with the molecular formula C17H28N3O8PS and a molecular weight of 465.46 g/mol.
The molecular framework of Ceftazidime Impurity C68 (C17H28N3O8PS) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a phosphate ester 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C17H28N3O8PS |
| Molecular Weight | 465.46 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) | 5.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2008 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Ceftazidime Standards
- Ceftazidime Impurity 73 (CAS CATO-C4X-121273)
- Ceftazidime Impurity 13 (CAS 1301254-50-1)
- Ceftazidime Impurity 40 (CAS CATO-C4X-121240)
- Ceftazidime Impurity 20 (CAS CATO-C4X-121220)
- Ceftazidime impurity 123 (CAS CATO-C4X-1212123)
- Ceftazidime Impurity 23 (CAS 158183-05-2)
- Ceftazidime Impurity 51 (CAS CATO-C4X-121251)
- Ceftazidime Impurity C07 (CAS 752152-44-6)
Recommended Standards
- Acetic acid 4,5-diacetoxy-6-acetoxymethyl-3-[(4-methoxy-benzylidene)-amino]-tetrahydro-pyran-2-yl ester (CAS 7597-81-1)
- 5-Acetamido-4-hydroxy-3-(phenyldiazenyl)naphthalene-2,7-disulfonic acid (CAS 25317-20-8)
- (2S,3R,4R,5R,6R)-6-(acetoxymethyl)-3-((4-methoxybenzylidene)amino)tetrahydro-2H-pyran-2,4,5-triyl triacetate (CAS 34948-61-3)
- 4-[6,6-Dimethyl-4-oxo-3-(trifluoromethyl)-4,5,6,7-tetrahydro-1H-indazol-1-yl]-2-{[(1r,4r)-4-hydroxycyclohexyl]amino}benzoic acid (CAS 1354448-64-8)
- Bilastine Impurity 2 (CAS 1638785-23-5)
- Phenytoin Impurity 21 (CAS CATO-C4X-186421)
- Butylphthalide Impurity 12 (CAS 2360-45-4)
- 1-Amino-4-(isopropylamino)anthracene-9,10-dione (CAS 62649-65-4)
- 6-(3-Nitrophenyl)-2-oxo-1,2,3,6-tetrahydropyrimidine-4-carboxylic acid (CAS 304443-35-4)
- Tafluprost Impurity 22 (CAS CATO-C4X-216322)
- Bortezomib Impurity 29 (CAS CATO-C4X-107229)
- (1S)-1-cyclobutylethan-1-amine hydrochloride (CAS 1355969-30-0)
- 3-acetoxypyridine (CAS 17747-43-2)
- D-Phe22-Tirzepatide (CAS CATO-CPTD788912)
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