Entecavir Impurity 76 (Racemic mixture) CAS CATO-C4X-107776
| CAS No. | CATO-C4X-107776 |
| Molecular Formula | C11H15N5O4 |
| Molecular Weight | 281.27 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Entecavir Impurity 76 (Racemic mixture) (C11H15N5O4) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 281.27 g/mol, it falls into the medium-molecular-weight range. 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).
CATO supplies Entecavir Impurity 76 (Racemic mixture) (CAS CATO-C4X-107776), a pharmacopoeial impurity reference standard (molecular formula C11H15N5O4, MW 281.27 g/mol) used for the identification and quantification of trace impurities in APIs.
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 76 (Racemic mixture) 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 | C11H15N5O4 |
| Molecular Weight | 281.27 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 5 |
Related Entecavir Standards
- Entecavir-13C2,15N (CAS 1329796-53-3)
- Entecavir (CAS 142217-69-4)
- Entecavir EP Impurity D (CAS 1367369-80-9)
- Entecavir Impurity 17 (CAS CATO-C4X-107717)
- Entecavir EP Impurity B (CAS 1367369-77-4)
- Entecavir Impurity 71 (CAS CATO-C4X-107771)
- Entecavir EP Impurity A (CAS 1367369-78-5)
- Entecavir Impurity 59 (CAS CATO-C4X-107759)
Recommended Standards
- Topiroxostat impurity 73 (CAS CATO-C4X-105573)
- Nitrazepam EP Impurity A (CAS 36020-93-6)
- Topiroxostat impurity 72 (CAS CATO-C4X-105572)
- Atogepant impurity (CAS 1375541-21-1)
- Empagliflozin impurity 244 (CAS CATO-C4X-1065244)
- Fluocinolone Acetonide impurity 118 (CAS CATO-C4X-238118)
- N-Nitroso Revefenacin impurity 102 (CAS 11348-65-3)
- Methyl 5,6-dihydroxy-1H-indole-2-carboxylate (CAS 10131-14-3)
- (1S,2S)-1,2-Di(4'-methoxyphenyl)-1,2-diaminoethane (CAS 58520-04-0)
- N-(azetidin-3-yl)-N-methylcyclopentanecarboxamide (CAS 1469128-57-1)
- 3,8-Diazabicyclo[3.2.1]octane (CAS 280-06-8)
- 5-Amino-1-(4-methoxyphenyl)-1h-1,2,3-triazole-4-carboxamide (CAS 887691-91-0)
- (E)-4-((4-ethoxyphenyl)diazenyl)benzene-1,3-diamine hydrochloride (CAS 2313-87-3)
- Tau Peptide (74-102) (Exon 3/Insert 2 Domain) trifluoroacetate salt (CAS 1322695-34-0)
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