Ornidazole Impurity 9 CAS 16773-51-6
| CAS No. | 16773-51-6 |
| Molecular Formula | C7H9N3O3 |
| Molecular Weight | 183.16 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 Ornidazole Impurity 9.
Ornidazole Impurity 9 (CAS 16773-51-6) is a certified pharmaceutical impurity reference standard with the molecular formula C7H9N3O3 and a molecular weight of 183.16 g/mol.
Ornidazole Impurity 9 (C7H9N3O3) 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. 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), Ornidazole Impurity 9 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 | C7H9N3O3 |
| Molecular Weight | 183.16 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, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1961 |
| Nitrogen Atoms | 3 |
Related Ornidazole Standards
- Ornidazole impurity 1 (CAS 1100750-18-2)
- Ornidazole Impurity 112 (CAS 943967-79-1)
- Ornidazole Impurity 2 (CAS 31876-69-4)
- Ornidazole Impurity 3 (CAS 16773-52-7)
- Ornidazole Impurity 35 (CAS CATO-C4X-133135)
- Ornidazole Impurity 97 (CAS CATO-C4X-133197)
- Ornidazole Impurity 111 (CAS CATO-C4X-1331111)
- Ornidazole Impurity C12 (CAS 13182-81-5)
Recommended Standards
- Sunitinib Impurity 5 (CAS 5434-29-7)
- Allopurinol EP Impurity E (CAS 31055-19-3)
- Entacapone impurity 38 (CAS CATO-C4X-162938)
- Bosutinib Impurity 33 (CAS 709-09-1)
- Tenofovir disoproxil Impurity 135 (CAS CATO-C4X-1076135)
- Dyclonine Impurity 24 (CAS CATO-C4X-188124)
- Abiraterone Impurity 68 (CAS CATO-C4X-107068)
- 2-Fluoro-N-(1,3,4-thiadiazol-2-yl)benzamide (CAS 313368-15-9)
- 5-[(2,5-Dichlorophenoxy)methyl]-2-furohydrazide (CAS 406470-85-7)
- Pregabalin Impurity 123 (CAS 1141362-94-8 (free base))
- 3-Cyanoazetidine-1-sulfonyl chloride (CAS 1310734-08-7)
- 4-Bromo-6-chloro-1-methylpyridin-2(1H)-one (CAS 1628839-56-4)
- 5-Bromo-3-ethoxy-2-methoxypyridine (CAS 909854-18-8)
- Galanin-Like Peptide (human) trifluoroacetate salt (CAS 245114-99-2)
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