Zonisamide impurity 8 CAS CATO-C4X-17858
| CAS No. | CATO-C4X-17858 |
| Molecular Formula | C9H9NO4S |
| Molecular Weight | 227.24 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.
Zonisamide impurity 8 (CAS CATO-C4X-17858) is a certified pharmaceutical impurity reference standard with the molecular formula C9H9NO4S and a molecular weight of 227.24 g/mol.
Based on its molecular formula C9H9NO4S, Zonisamide impurity 8 contains a nitrogen-containing heterocyclic scaffold, 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 227.24 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).
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 | C9H9NO4S |
| Molecular Weight | 227.24 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Zonisamide Standards
- Zonisamide Impurity 17 (CAS CATO-C4X-178517)
- Zonisamide Impurity 4 (CAS 68292-02-4)
- Zonisamide Chloride (CAS 73101-65-2)
- Zonisamide sodium salt (CAS 68291-98-5)
- Zonisamide Impurity 1 (CAS CATO-C4X-17851)
- Zonisamide-d4 (CAS 1020720-04-0)
- Zonisamide-13C2-15N (CAS 1188265-58-8)
- Zonisamide impurity 9 (CAS CATO-C4X-17859)
Recommended Standards
- S-Ethyl O-(4-Nitrophenyl) Carbonothioate (CAS 320343-87-1)
- Carbazochrome Impurity 5 (CAS 2271443-87-7)
- Osilodrostat (CAS 928134-65-0)
- Phospholan-methyl (CAS 5120-23-0)
- Daprodustat Impurity 12 (CAS 10468-40-3)
- Ethosuximide impurity 10 (CAS CATO-C4X-262510)
- Prasugrel EP Impurity E (CAS 1056459-37-0)
- cis-Cyclohexane-1,2-diamine sulfate (CAS 65433-80-9)
- Proadifen Hydrochloride (CAS 62-68-0)
- 2-Methoxy-4-methyl-1-nitrobenzene (CAS 38512-82-2)
- 1-Cycloheptyl-1h-benzo[d]imidazole-5-carboxylic acid (CAS 284673-23-0)
- 3-(Bromomethyl)-3-methyl-1-(methylsulfonyl)pentane (CAS 1491123-99-9)
- 3-Isopropoxy-N-[2-(4-isopropylphenoxy)ethyl]-aniline (CAS 1040684-02-3)
- Tirzepatide Impurity 59 (CAS CATO-C4X-324059)
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