Cefalotin Impurity 5 CAS 3432-90-4
| CAS No. | 3432-90-4 |
| Molecular Formula | C16H16N2O6S2 |
| Molecular Weight | 396.44 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Cefalotin Impurity 5 (CAS 3432-90-4) is a certified pharmaceutical impurity reference standard with the molecular formula C16H16N2O6S2 and a molecular weight of 396.44 g/mol.
Based on its molecular formula C16H16N2O6S2, Cefalotin Impurity 5 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 396.44 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).
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 | C16H16N2O6S2 |
| Molecular Weight | 396.44 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 2 |
Related Cefalotin Standards
- Cefalotin Impurity 7 (CAS CATO-C4X-12847)
- Cefalotin Impurity 6 (CAS 35565-06-1)
- Cefalotin Impurity 10 (CAS CATO-C4X-128410)
- Cefalotin EP Impurity B (CAS 5935-65-9)
- Cefalotin EP Impurity A (CAS 34691-02-6)
- Cefalotin EP Impurity C/Cefoperazone EP Impurity E/Cefazolin EP Impurity H (CAS 957-68-6)
- Cefalotin Impurity 9 (CAS CATO-C4X-12849)
- Cefalotin EP Impurity B (Na) (CAS 5547-29-5)
Recommended Standards
- Aprepitant Impurity 36 (CAS 638990-20-2)
- Dronedarone Impurity 96 (CAS CATO-C4X-109296)
- Benazepril EP Impurity C (CAS 86541-78-8)
- AOH1160 (CAS 2089314-57-6)
- Niraparib Impurity 16 (CAS CATO-C4X-232916)
- Methotrexate Impurity 75 (CAS CATO-C4X-115475)
- Lifitegrast Impurity 37 (CAS 1194550-56-5)
- 5-(4-Aminophenyl)-5-methylimidazolidine-2,4-dione (CAS 103273-09-2)
- tert-Butyl 3-hydroxy-2,2-dimethyl-5-oxo-2,5-dihydro-1H-pyrrole-1-carboxylate (CAS 1352723-60-4)
- 2-(3-Bromophenyl)-4'-cyanoacetophenone (CAS 898784-13-9)
- 3-Cyclopentyl-2-oxopropionic acid ethyl ester (CAS 1038403-37-0)
- 1,3-Dibromo-5-(difluoromethoxy)benzene (CAS 433939-48-1)
- 2-(2,6-dichloro-3-fluorophenyl)ethanol (CAS 1571065-36-5)
- Semaglutide Impurity 185 (CAS CATO-C4X-2226185)
Why CATO?
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