Famciclovir Impurity 20 CAS CATO-C4X-164220
| CAS No. | CATO-C4X-164220 |
| Molecular Formula | C28H36N10O8 |
| Molecular Weight | 640.65 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Famciclovir Impurity 20 (CAS CATO-C4X-164220), a pharmacopoeial impurity reference standard (molecular formula C28H36N10O8, MW 640.65 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, Famciclovir Impurity 20 is typically pale yellow to yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 640.65 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
As a certified reference material (CRM), Famciclovir Impurity 20 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C28H36N10O8 |
| Molecular Weight | 640.65 g/mol |
| 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) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 10 |
Related Famciclovir Standards
- Famciclovir Impurity 29 (CAS 2868360-27-2)
- Famciclovir Impurity 32 (CAS CATO-C4X-164232)
- Famciclovir Impurity 19 (CAS 1797985-90-0)
- Famciclovir Impurity 35 (CAS CATO-C4X-164235)
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- Famciclovir Impurity 26 (CAS CATO-C4X-164226)
- Famciclovir Impurity 23 (CAS CATO-C4X-164223)
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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