Entecavir Impurity 61 CAS 1907700-40-6
| CAS No. | 1907700-40-6 |
| Molecular Formula | C32H33N5O4 |
| Molecular Weight | 551.64 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Entecavir Impurity 61 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.
As a process- or degradation-related impurity, Entecavir Impurity 61 (CAS 1907700-40-6, C32H33N5O4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Structurally, Entecavir Impurity 61 (C32H33N5O4) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 19.0, corresponding to approximately 19 ring(s) or double-bond equivalent(s). With a molecular weight of 551.64 g/mol, it falls into the moderately-high-molecular-weight range. 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.
Physical & Chemical Properties
| Molecular Formula | C32H33N5O4 |
| Molecular Weight | 551.64 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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) | 19.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1995 |
| Nitrogen Atoms | 5 |
Related Entecavir Standards
- Entecavir Impurity 18 (CAS CATO-C4X-107718)
- Entecavir Impurity 60 (CAS 142217-77-4)
- 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)
- Entecavir Impurity 85 (CAS CATO-C4X-107785)
- Entecavir Intermediates â…§ (CAS 204845-95-4)
Recommended Standards
- Akti-1/2 (CAS 612847-09-3)
- Nifekalant impurity 4 (CAS CATO-C4X-27974)
- Venetoclax Impurity 96 (CAS CATO-C4X-249596)
- Venetoclax Impurity 73 (CAS CATO-C4X-249573)
- Bosentan Impurity 12 (CAS CATO-C4X-156412)
- Cabotegravir Impurity 15 (CAS CATO-C4X-287615)
- Benzylpenicillin Impurity 30 (CAS 525-94-0)
- Methacryloxydiphenylantimony (CAS 5613-66-1)
- (S)-2-amino-N-(4-bromobenzyl)-N,3-dimethylbutanamide (CAS 1307505-25-4)
- tert-Butyl ((2R,3R)-4-chloro-3-hydroxy-3-methylbutan-2-yl)carbamate (CAS 2883819-42-7)
- Bromfenac Impurity 41 (CAS 2192334-72-6)
- (2S,4R)-4-(2-Methoxy-2-oxoethyl)pyrrolidine-2-carboxylic acid hydrochloride (CAS 2137144-77-3)
- Oxazepam impurity 6 (CAS CATO-C4X-30906)
- Tau Peptide (306-336) (Repeat 3 Domain) trifluoroacetate salt (CAS 330456-26-3)
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