Cephalexin Impurity 19 CAS CATO-C4X-126119
| CAS No. | CATO-C4X-126119 |
| Molecular Formula | C16H19N3O5S |
| Molecular Weight | 365.40 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a process- or degradation-related impurity, Cephalexin Impurity 19 (CAS CATO-C4X-126119, C16H19N3O5S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C16H19N3O5S, Cephalexin Impurity 19 contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 365.40 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 Cephalexin Impurity 19 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 | C16H19N3O5S |
| Molecular Weight | 365.40 g/mol |
| Purity | >80% |
| Storage | Store at 2-8°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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Cephalexin Standards
- Cephalexin Impurity 13 (CAS 1323247-65-9)
- Cephalexin Oxide Impurity 1 (CAS 56193-21-6)
- Cephalexin Sulfoxide Impurity 31 (CAS 74708-55-7)
- Cephalexin Impurity 42 (CAS 52210-38-5)
- Cephalexin Impurity 15 (CAS 36114-06-4)
- Cephalexin-d5 Hydrate (CAS CATO-CCHM703163)
- Cephalexin Impurity 44 (CAS CATO-C4X-126144)
- Cephalexin Impurity 47 (CAS CATO-C4X-126147)
Recommended Standards
- Aztreonam Impurity 116 (CAS CATO-C4X-1522116)
- Cefradine EP Impurity C&D Mixture (CAS CATO-C4X-12158)
- Sultamicillin Impurity 10 (CAS CATO-C4X-188610)
- Cefradine EP Impurity C (CAS CATO-C4X-12157)
- Olopatadine Impurity 19 (CAS 55690-15-8)
- Vilanterol Impurity 91 (CAS CATO-C4X-193591)
- Sulfadimethoxine EP Impurity B (CAS 555-25-9)
- 2-Methyl-5-(prop-1-en-2-yl)pyridine (CAS 56057-93-3)
- Ethyl 2-(2-Bromo-5-fluorophenyl)acetate (CAS 1214910-61-8)
- 2-Butyl-1,3,6,2-dioxazaborocane (CAS 92527-13-4)
- (4,5-Difluoro-2-(pyrrolidin-1-ylsulfonyl)phenyl)boronic acid (CAS 1704066-91-0)
- 3-(3-(Trifluoromethyl)phenyl)picolinic acid (CAS 1226367-18-5)
- Acesulfame impurity 4 (CAS 459454-05-8)
- Semaglutide impurity 94 (CAS CATO-C4X-222694)
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