Ornidazole Impurity 31 CAS 57939-59-0
| CAS No. | 57939-59-0 |
| Molecular Formula | C9H12ClN3O4 |
| Molecular Weight | 261.66 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.
As a process- or degradation-related impurity, Ornidazole Impurity 31 (CAS 57939-59-0, C9H12ClN3O4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, Ornidazole Impurity 31 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 261.66 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), Ornidazole Impurity 31 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 | C9H12ClN3O4 |
| Molecular Weight | 261.66 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| 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 |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1973 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Ornidazole Standards
- Ornidazole Impurity 73 (CAS CATO-C4X-133173)
- Ornidazole Impurity 92 (CAS 1685317-97-8)
- Ornidazole Impurity 15 (CAS 105687-87-4)
- Ornidazole Impurity 93 (CAS CATO-C4X-133193)
- Ornidazole Impurity 83 (CAS CATO-C4X-133183)
- Ornidazole Impurity 61 (CAS CATO-C4X-133161)
- Ornidazole Impurity 100 (CAS CATO-C4X-1331100)
- Ornidazole Impurity 77 (CAS CATO-C4X-133177)
Recommended Standards
- Neratinib Impurity 38 (CAS 2240142-43-0)
- Alogliptin Impurity 44 (CAS 865758-95-8)
- 3-(3-Chloro-4-methylphenyl)-3,6-dihydro-7H-[1,2,3]triazolo[4,5-d]pyrimidin-7-one (CAS 1082366-91-3)
- 386275-22-5 (2-Chloro-pyridin-3-yl)-[1-(4-nitro-phenyl)-meth-(E)-ylidene]-amine MFCD11227194 (CAS 386275-22-5)
- Cabotegravir impurity 20 (CAS CATO-C4X-287620)
- Clenbuterol EP impurity C (CAS 37148-48-4)
- Baloxavir Marboxil Impurity 197 (CAS 1985606-16-3)
- 4-chloro-5-methyl-6-(methylthio)pyrimidine (CAS 1343398-23-1)
- (3A'R,5'S,6'S,6a'R)-6'-hydroxytetrahydrospiro[cyclohexane-1,2'-furo[2,3-d][1,3]dioxole]-5'-carbaldehyde (CAS 15356-27-1)
- 3-[(Pentyloxy)methyl]piperidine hydrochloride (CAS 1220036-94-1)
- 3,3,3-Trifluoro-1-(2-methoxyphenyl)propan-1-one (CAS 130654-91-0)
- 4-Chlorophenyl sulfamate (CAS 25998-89-4)
- (S)-2-Amino-N-methyl-N-(2-oxo-2-(thiazol-2-yl)ethyl)propanamide (CAS 1354008-26-6)
- Peptide YY (canine, mouse, porcine, rat) trifluoroacetate salt (CAS 81858-94-8)
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