Oxibendazole Impurity 2 CAS 20367-33-3
| CAS No. | 20367-33-3 |
| Molecular Formula | C11H14N2O4 |
| Molecular Weight | 238.24 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Oxibendazole Impurity 2 (CAS 20367-33-3), a pharmacopoeial impurity reference standard (molecular formula C11H14N2O4, MW 238.24 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C11H14N2O4, Oxibendazole Impurity 2 contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 238.24 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 certified reference material (CRM), Oxibendazole Impurity 2 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 | C11H14N2O4 |
| Molecular Weight | 238.24 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Nitrogen Atoms | 2 |
Related Oxibendazole Standards
Recommended Standards
- Nifekalant Impurity 15 (CAS CATO-C4X-279715)
- Aminolevulinic acid Impurity 2 (CAS 2443361-23-5)
- Nifekalant Impurity 14 (CAS CATO-C4X-279714)
- Gliquidone Impurity 5 (CAS 1314701-46-6)
- Trelagliptin Impurity 50 (CAS CATO-C4X-104650)
- Ulipristal Impurity 28 (CAS 42982-49-0)
- Vilanterol Impurity 74 (CAS CATO-C4X-193574)
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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