Semaglutide impurity 257 CAS CATO-C4X-2226257
| CAS No. | CATO-C4X-2226257 |
| Molecular Formula | - |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Semaglutide impurity 257 is supplied as a fully characterized reference material; its structural identity, assigned purity, and stability data are documented in the batch-specific Certificate of Analysis (COA).
As a process- or degradation-related impurity, Semaglutide impurity 257 (CAS CATO-C4X-2226257, N/A) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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.
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.
Physical & Chemical Properties
| Purity | 97%+ |
| Storage | Store at 2-8°C |
| Solubility (reference) | Freely soluble in water |
| Stability | Stable under recommended storage conditions |
Related Semaglutide Standards
- Semaglutide impurity 29 (CAS 110990-08-4)
- Semaglutide impurity 22(OtBu-Ste-γGlu(OtBu)-AEEA-AEEA-OH) (CAS 1118767-16-0)
- Semaglutide Main Chain P29 (CAS 1169630-82-3)
- Semaglutide impurity 29 (CAS 1188328-22-4)
- Semaglutide Impurity 130 (CAS 1188328-40-6)
- Semaglutide Impurity 21(HO-Ste-L-γGlu-AEEA-AEEA-OH) (CAS 1335440-44-2)
- Semaglutide Impurity 166 (CAS 1395881-03-4)
- Semaglutide impurity 103 (CAS 1446013-07-5)
Recommended Standards
- Flurbiprofen Impurity 12 (CAS 55258-76-9)
- Linezolid Impurity 65 (CAS CATO-C4X-107365)
- Ilaprazole Impurity 234 (CAS CATO-C4X-1130234)
- N-(4-Fluoro-phenyl)-2-(5-mercapto-4-methyl-4H-[1,2,4]triazol-3-yl)-acetamide (CAS 792944-66-2)
- N-(pyridin-4-ylmethyl)piperidine-4-carboxamide (CAS 429635-58-5)
- 1-(6,8-Diethyl-4-hydroxyquinolin-3-yl)ethanone (CAS 91733-26-5)
- 2-Methoxy-4,6-dimethylpyrimidine-5-carbaldehyde (CAS 1823338-21-1)
- Racemorphan Hydrobromide - API (CAS 5985-35-3)
- Clindamycin 2,4-Dipalmitate (CAS CATO-C4X-1341127)
- Semaglutide Impurity 82 (CAS CATO-C4X-222682)
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