Entecavir Impurity 42 CAS CATO-C4X-107742
| CAS No. | CATO-C4X-107742 |
| Molecular Formula | C24H35N5O13 |
| Molecular Weight | 601.56 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Entecavir Impurity 42 (CAS CATO-C4X-107742) is a certified pharmaceutical impurity reference standard with the molecular formula C24H35N5O13 and a molecular weight of 601.56 g/mol.
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, Entecavir Impurity 42 is typically pale yellow to yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 601.56 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
CATO manufactures Entecavir Impurity 42 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 | 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 43 (CAS CATO-C4X-107743)
- 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
- (SP-4-1)-[1-[2-[Bis(1-methylethyl)amino]ethyl]-1,3-dihydro-3-methyl-2H-imidazol-2-ylidene]dibromochlorogold (CAS 1302578-04-6)
- 1,2,3,4,6,7-Hexabromonaphthalene (CAS 75625-24-0)
- 3-((3,5-Bis(trifluoromethyl)phenyl)amino)-4-(((1R,2R)-2-(dibenzylamino)cyclohexyl)amino)cyclobut-3-ene-1,2-dione (CAS 1223105-91-6)
- 2-[[4-[[4-[(2,4-Diaminopteridin-6-ylMethyl-Methylamino]Benzoyl]Amino]-2-Fluoro-5-Hydroxy-5-Oxopentanoyl]Amino]Pentanedioic Acid (CAS 124716-15-0)
- Estradiol Impurity 25 (CAS 4245-41-4)
- Entecavir Impurity 76 (Racemic mixture) (CAS CATO-C4X-107776)
- Landiolol Impurity 108 (CAS CATO-C4X-2621108)
- 1-(Furan-2-carbonyl)-2-methylpiperazine (CAS 146951-80-6)
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- Tris(2-ethylhexyl)(phenyl)silane (CAS 18765-52-1)
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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