Entecavir Impurity 49 CAS CATO-C4X-107749
| CAS No. | CATO-C4X-107749 |
| Molecular Formula | C52H47N5O3 |
| Molecular Weight | 789.96 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.
CATO supplies Entecavir Impurity 49 (CAS CATO-C4X-107749), a pharmacopoeial impurity reference standard (molecular formula C52H47N5O3, MW 789.96 g/mol) used for the identification and quantification of trace impurities in APIs.
Entecavir Impurity 49 (C52H47N5O3) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
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 | C52H47N5O3 |
| Molecular Weight | 789.96 g/mol |
| Purity | >95% |
| 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) | 32.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 5 |
Related Entecavir Standards
- Entecavir Impurity 50 (CAS CATO-C4X-107750)
- Entecavir Impurity 51 (CAS CATO-C4X-107751)
- Entecavir Impurity 52 (CAS CATO-C4X-107752)
- Entecavir Impurity 73 (CAS CATO-C4X-107773)
- Entecavir Impurity 74 (CAS CATO-C4X-107774)
- Entecavir Impurity 86 (CAS CATO-C4X-107786)
- Entecavir Impurity 53 (CAS CATO-C4X-107753)
- Entecavir Impurity 72 (CAS CATO-C4X-107772)
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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