Ensifentrine impurity 44 CAS CATO-C4X-335344
| CAS No. | CATO-C4X-335344 |
| Molecular Formula | C13H11ClN2O3 |
| Molecular Weight | 278.69 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C13H11ClN2O3, Ensifentrine impurity 44 contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 278.69 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Ensifentrine impurity 44 (CAS CATO-C4X-335344) is a certified pharmaceutical impurity reference standard with the molecular formula C13H11ClN2O3 and a molecular weight of 278.69 g/mol.
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.
CATO manufactures Ensifentrine impurity 44 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C13H11ClN2O3 |
| Molecular Weight | 278.69 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-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 DMSO, DMF, methanol |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Ensifentrine Standards
- Ensifentrine impurity 46 (CAS CATO-C4X-335346)
- Ensifentrine impurity 50 (CAS 39201-71-3)
- Ensifentrine impurity (CAS 4359-64-2)
- Ensifentrine Impurity 26 (CAS CATO-C4X-335326)
- Ensifentrine impurity 48 (CAS 20488-59-9)
- Ensifentrine Impurity 2 (CAS 75535-95-4)
- Ensifentrine impurity 45 (CAS 3088358-10-2)
- Ensifentrine impurity 7 (CAS 91209-79-9)
Recommended Standards
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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