Valaciclovir Impurity 43 CAS CATO-C4X-124843
| CAS No. | CATO-C4X-124843 |
| Molecular Formula | C18H20N6O4 |
| Molecular Weight | 384.39 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Valaciclovir Impurity 43.
Valaciclovir Impurity 43 (CAS CATO-C4X-124843) is a certified pharmaceutical impurity reference standard with the molecular formula C18H20N6O4 and a molecular weight of 384.39 g/mol.
Valaciclovir Impurity 43 (C18H20N6O4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
CATO manufactures Valaciclovir Impurity 43 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 | C18H20N6O4 |
| Molecular Weight | 384.39 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 6 |
Related Valaciclovir Standards
- Valaciclovir Impurity 41 (CAS CATO-C4X-124841)
- Valaciclovir Impurity 55 (CAS CATO-C4X-124855)
- Valaciclovir EP Impurity K (CAS CATO-C4X-124811)
- Valaciclovir Impurity 38 (CAS CATO-C4X-124838)
- Valaciclovir EP Impurity D (CAS 1346747-69-0)
- Valaciclovir EP Impurity M (CAS 847670-62-6)
- Valaciclovir Impurity 36 (CAS 19542-54-2)
- Valaciclovir Impurity 37 (CAS CATO-C4X-124837)
Recommended Standards
- Cefotaxime Impurity 33 (CAS CATO-C4X-120133)
- Valganciclovir Impurity 6 (CAS 1356932-88-1)
- Cinacalcet Impurity 64 (CAS CATO-C4X-105964)
- Valganciclovir Impurity 8 (CAS 1356353-76-8)
- Piracetam impurity 32 HCl (CAS CATO-C4X-123532)
- Esomeprazole impurity 138 (CAS CATO-C4X-1112138)
- Rivaroxaban Impurity 118 (CAS CATO-C4X-1090118)
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- 1-[(2H-1,3-Benzodioxol-5-yl)methyl]-4-(2,4,6-trimethylbenzenesulfonyl)piperazine (CAS 349624-04-0)
- Serpent Peptide 2AcOH (CAS 823202-99-9(free base))
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