Ensifentrine impurity 18 CAS CATO-C4X-335318
| CAS No. | CATO-C4X-335318 |
| Molecular Formula | C33H32N4O5 |
| Molecular Weight | 564.63 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Ensifentrine impurity 18 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.
As a process- or degradation-related impurity, Ensifentrine impurity 18 (CAS CATO-C4X-335318, C33H32N4O5) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C33H32N4O5, Ensifentrine impurity 18 contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 564.63 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C33H32N4O5 |
| Molecular Weight | 564.63 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 20.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 4 |
Related Ensifentrine Standards
- Ensifentrine impurity 17 (CAS 3046226-90-5)
- Ensifentrine impurity 39 (CAS CATO-C4X-335339)
- Ensifentrine impurity 6 (CAS 298680-38-3)
- Ensifentrine impurity 19 (CAS CATO-C4X-335319)
- Ensifentrine impurity 20 (CAS CATO-C4X-335320)
- Ensifentrine impurity 15 (CAS CATO-C4X-335315)
- Ensifentrine impurity 14 (CAS CATO-C4X-335314)
- Ensifentrine impurity 31 (CAS CATO-C4X-335331)
Recommended Standards
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