Ornidazole Impurity 91 CAS CATO-C4X-133191
| CAS No. | CATO-C4X-133191 |
| Molecular Formula | C7H10ClN3O4 |
| Molecular Weight | 235.63 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, Ornidazole Impurity 91 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 235.63 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
CATO supplies Ornidazole Impurity 91 (CAS CATO-C4X-133191), a pharmacopoeial impurity reference standard (molecular formula C7H10ClN3O4, MW 235.63 g/mol) used for the identification and quantification of trace impurities in APIs.
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.
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 | C7H10ClN3O4 |
| Molecular Weight | 235.63 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, 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Ornidazole Standards
- Ornidazole Impurity 115 (CAS CATO-C4X-1331115)
- Ornidazole Impurity 26 (CAS 62580-79-4)
- Ornidazole Impurity 29 (CAS CATO-C4X-133129)
- Ornidazole Impurity 30 (CAS CATO-C4X-133130)
- Ornidazole Impurity 36 (CAS 53726-70-8)
- Ornidazole Impurity 55 (CAS CATO-C4X-133155)
- Ornidazole Impurity 54 (CAS CATO-C4X-133154)
- Ornidazole Impurity 114 (CAS CATO-C4X-1331114)
Recommended Standards
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- (6-Chloropyridin-3-yl)(3-fluorophenyl)methanone (CAS 1187168-05-3)
- Olanzapine Impurity 29 (CAS 59591-86-5)
- Caspofungin EP Impurity A acetate (CAS CATO-C4X-157539)
- Epinephrine /Adrenaline Impurity 138 (CAS CATO-C4X-1849138)
- Bicyclo[3.2.1]Octane-8-carboxylic acid (CAS 1780656-41-8)
- Osimertinib Impurity 67 (CAS CATO-C4X-204567)
- 7,7-Dimethyl-1,2,3,4,7,8-hexahydroquinolin-5(6H)-one (CAS 1010-82-8)
- Lancilactone C (CAS 218915-17-4)
- (S)-N-(3-Chlorobenzyl)-N-cyclopentylpyrrolidin-3-amine (CAS 820979-76-8)
- 3-Ethylcyclohexane-1-sulfonyl chloride (CAS 1343304-06-2)
- (D-Ala1)-Peptide T amide (CAS 106362-34-9)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com