Entecavir Impurity 43 CAS CATO-C4X-107743
| CAS No. | CATO-C4X-107743 |
| Molecular Formula | C24H35N5O13 |
| Molecular Weight | 601.56 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Entecavir Impurity 43 (CAS CATO-C4X-107743) is a certified pharmaceutical impurity reference standard with the molecular formula C24H35N5O13 and a molecular weight of 601.56 g/mol.
Based on its molecular formula C24H35N5O13, Entecavir Impurity 43 contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 601.56 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), Entecavir Impurity 43 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 | C24H35N5O13 |
| Molecular Weight | 601.56 g/mol |
| 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 5 |
Related Entecavir Standards
- Entecavir Impurity 42 (CAS CATO-C4X-107742)
- Entecavir Impurity 18 (CAS CATO-C4X-107718)
- Entecavir Impurity 60 (CAS 142217-77-4)
- Entecavir Impurity 61 (CAS 1907700-40-6)
- Entecavir Impurity 62 (CAS CATO-C4X-107762)
- Entecavir Impurity 63 (CAS CATO-C4X-107763)
- Entecavir Impurity 64 (CAS CATO-C4X-107764)
- Entecavir Impurity 69 (CAS CATO-C4X-107769)
Recommended Standards
- 3-((3,5-Bis(trifluoromethyl)phenyl)amino)-4-(((1R,2R)-2-(dibenzylamino)cyclohexyl)amino)cyclobut-3-ene-1,2-dione (CAS 1223105-91-6)
- (SP-4-1)-[1-[2-[Bis(1-methylethyl)amino]ethyl]-1,3-dihydro-3-methyl-2H-imidazol-2-ylidene]dibromochlorogold (CAS 1302578-04-6)
- 3-((3,5-bis(trifluoromethyl)phenyl)amino)-4-(((1S,2S)-2-(dibenzylamino)cyclohexyl)amino)cyclobut-3-ene-1,2-dione (CAS 1623099-31-9)
- 1,2,3,4,6,7-Hexabromonaphthalene (CAS 75625-24-0)
- Aripiprazole Impurity 38 (CAS CATO-C4X-100838)
- Clotrimazole Impurity 22 (CAS 59154-29-9)
- Bilastine Impurity 71 (CAS CATO-C4X-225371)
- N-(3-amino-2-methylphenyl)furan-2-carboxamide (CAS 900636-13-7)
- [1-(3,4-dichlorobenzoyl)-4-fluoro-4-piperidinyl]methyl 2,4,5-trichlorobenzenesulfonate (CAS 477857-56-0)
- 3-Amino-4-bromo-2,6-dichloropyridine (CAS 1121586-37-5)
- tert-Butyl (2S,3S)-3-fluoro-2-(hydroxymethyl)pyrrolidine-1-carboxylate (CAS 1932010-92-8)
- 2-((6-Fluoro-2-methylquinolin-4-yl)thio)benzoic acid (CAS 88350-81-6)
- 3,5,5-Trimethylhexan-1-amine (CAS 3378-63-0)
- DAPK Substrate Peptide (CAS 386769-53-5)
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