Ornidazole Impurity 81 CAS CATO-C4X-133181
| CAS No. | CATO-C4X-133181 |
| Molecular Formula | C7H11ClN3O6P |
| Molecular Weight | 299.61 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Ornidazole Impurity 81 is closely related to a carbohydrate-derived structure, an amide group, a phosphate ester group, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Ornidazole Impurity 81 (CAS CATO-C4X-133181) is a certified pharmaceutical impurity reference standard with the molecular formula C7H11ClN3O6P and a molecular weight of 299.61 g/mol.
The molecular framework of Ornidazole Impurity 81 (C7H11ClN3O6P) is characterized by a carbohydrate-derived structure, an amide group, a phosphate ester group, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 81 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 | C7H11ClN3O6P |
| Molecular Weight | 299.61 g/mol |
| Appearance | White to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | ≥95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.5 |
| UV Absorption | UV-absorbing |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Ornidazole Standards
- Ornidazole Impurity 84 (CAS CATO-C4X-133184)
- Ornidazole Impurity 56 (CAS CATO-C4X-133156)
- Ornidazole Impurity 22 (CAS 74550-92-8)
- Ornidazole Impurity 42 (CAS 95881-05-3)
- Ornidazole Impurity 69 (CAS CATO-C4X-133169)
- Ornidazole Impurity 108 (CAS CATO-C4X-1331108)
- Ornidazole Impurity 20 (CAS 1413431-46-5)
- Ornidazole Impurity 53 (CAS CATO-C4X-133153)
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- rac-(2R,3R)-3-phenyl-1,4-dioxane-2-carboxylic acid (CAS 1969287-91-9)
- 3-Methylpyridine-2-sulfonic acid amide (CAS 65938-79-6)
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