Cefazolin Impurity 65 CAS CATO-C4X-157765
| CAS No. | CATO-C4X-157765 |
| Molecular Formula | C5H9N5O3 |
| Molecular Weight | 187.16 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Cefazolin Impurity 65 (CAS CATO-C4X-157765) is a certified pharmaceutical impurity reference standard with the molecular formula C5H9N5O3 and a molecular weight of 187.16 g/mol.
Cefazolin Impurity 65 (C5H9N5O3) contains an amino-acid-derived structure, an amide 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C5H9N5O3 |
| Molecular Weight | 187.16 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Nitrogen Atoms | 5 |
Related Cefazolin Standards
- Cefazolin Impurity 87 (CAS CATO-C4X-157787)
- Cefazolin Impurity 58 (CAS 1012-29-9)
- (Z)-Cefazolin Impurity 44 (CAS 66338-95-2)
- Cefazolin Impurity 44 (CAS 20198-75-8)
- Cefazolin Impurity 31 (CAS CATO-C4X-157731)
- Cefazolin Impurity 26 (CAS CATO-C4X-157726)
- Cefazolin Impurity 39 (CAS 13616-37-0)
- Cefazolin Impurity 28 (CAS 26240-90-4)
Recommended Standards
- Topiroxostat Impurity 42 (CAS CATO-C4X-105542)
- Tetrazolo[1,5-a]quinoxalin-4(5H)-one (CAS 29067-85-4)
- rac 3,4-Dihydroxymandelic Acid-d3 (CAS CATO-CCHM702952)
- Pyrido[3,4-e][1,2,4]triazolo[1,5-a]pyrimidin-6-ol (CAS 932233-33-5)
- Ruxolitinib Impurity 109 (CAS CATO-C4X-2058109)
- Letermovir Impurity 84 (CAS CATO-C4X-291584)
- Dopamine Impurity 97 (CAS CATO-C4X-190897)
- 4-Amino-2,3-bis(benzoyloxy)-4-oxobutanoic acid (CAS 98341-66-3)
- 2-Methyl-5-((methylthio)methyl)furan (CAS 13679-60-2)
- (2-Amino-4-(difluoromethyl)-6-iodopyridin-3-yl)methanol (CAS 1806814-96-9)
- Methyl (R)-3-(((benzyloxy)carbonyl)amino)-4-hydroxy-3-methylbutanoate (CAS 1802736-71-5)
- [(1R,2S)-2-aminocyclohexyl]methanol (CAS 213764-26-2)
- 8-Bromo-5-methoxyquinolin-4(1H)-one (CAS 643069-40-3)
- Galanin-Like Peptide (porcine) trifluoroacetate salt (CAS 245114-96-9)
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