Zonisamide Impurity 5 CAS 4865-84-3
| CAS No. | 4865-84-3 |
| Molecular Formula | C9H7NO3 |
| Molecular Weight | 177.16 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Zonisamide Impurity 5.
Zonisamide Impurity 5 (CAS 4865-84-3) is a certified pharmaceutical impurity reference standard with the molecular formula C9H7NO3 and a molecular weight of 177.16 g/mol.
Structurally, Zonisamide Impurity 5 (C9H7NO3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 177.16 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
As a certified reference material (CRM), Zonisamide Impurity 5 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C9H7NO3 |
| Molecular Weight | 177.16 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | >95% |
| 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 1 |
Related Zonisamide Standards
- Zonisamide Impurity 14 (CAS 23008-68-6)
- Zonisamide impurity 12 (CAS 2320-33-4)
- Zonisamide Impurity 16 (CAS 59899-89-7)
- Zonisamide impurity 11 (CAS CATO-C4X-178511)
- Zonisamide Impurity 13 (CAS 1196-29-8)
- Zonisamide Impurity 15 (CAS 23008-65-3)
- Zonisamide (CAS 68291-97-4)
- Zonisamide Related Compound A (CAS 342623-49-8)
Recommended Standards
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- Ibuprofen Impurity 21 (CAS 59771-24-3)
- Abiraterone Impurity 75 (CAS 1416316-29-4)
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- 2-(Trifluoromethyl)-3h-imidazo[4,5-b]pyridine (CAS 13797-63-2)
- 3-Amino-4-hydroxyphenylarsonic acid (CAS 2163-77-1)
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- 2',5'-Dimethoxy-[1,1':4',1''-terphenyl]-4,4''-dicarboxylic acid (CAS 1392416-19-1)
- Pramipexole Impurity 47 (CAS 1373869-89-6)
- (D-Ala2)-Gastric Inhibitory Polypeptide (human) trifluoroacetate salt (CAS 444073-04-5)
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