Oxybuprocaine EP Impurity B CAS 23442-22-0
| CAS No. | 23442-22-0 |
| Molecular Formula | C11H15NO3 |
| Molecular Weight | 209.24 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
As a process- or degradation-related impurity, Oxybuprocaine EP Impurity B (CAS 23442-22-0, C11H15NO3) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
The molecular framework of Oxybuprocaine EP Impurity B (C11H15NO3) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.
Physical & Chemical Properties
| Molecular Formula | C11H15NO3 |
| Molecular Weight | 209.24 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Nitrogen Atoms | 1 |
Related Oxybuprocaine Standards
- Oxybuprocaine Impurity 4 (CAS 1096863-52-3)
- Oxybuprocaine Impurity 6 (CAS 72101-53-2)
- Oxybuprocaine Impurity 2 (CAS 1309686-09-6)
- Oxybuprocaine Hydrochloride EP Impurity C (CAS 2374-03-0)
- Oxybuprocaine Impurity 12 (CAS CATO-C4X-122712)
- Oxybuprocaine Impurity 1 (CAS CATO-C4X-12271)
- Oxybuprocaine Impurity 8 (CAS CATO-C4X-12278)
- Oxybuprocaine (CAS 99-43-4)
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