Favipiravir Impurity 16 CAS 1023813-21-9
| CAS No. | 1023813-21-9 |
| Molecular Formula | C5H3Cl2N3O |
| Molecular Weight | 192.00 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Favipiravir Impurity 16 (C5H3Cl2N3O) contains an amide group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 192.00 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a process- or degradation-related impurity, Favipiravir Impurity 16 (CAS 1023813-21-9, C5H3Cl2N3O) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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), Favipiravir Impurity 16 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 | C5H3Cl2N3O |
| Molecular Weight | 192.00 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1988 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Favipiravir Standards
- Favipiravir Impurity 13 (CAS CATO-C4X-210213)
- Favipiravir Impurity 18 (CAS 259793-97-0)
- Favipiravir Impurity 23 (CAS 356783-14-7)
- Favipiravir Impurity 5 (CAS 356783-16-9)
- Favipiravir Impurity 2 (CAS 259793-90-3)
- Favipiravir Impurity 1 (CAS CATO-C4X-21021)
- Favipiravir Impurity 23 (CAS 2091074-00-7)
- Favipiravir Impurity 17 (CAS 6329-74-4)
Recommended Standards
- Domperidone Impurity 25 (CAS 3209-22-1)
- Avatrombopag Impurity 32 (CAS 41667-95-2)
- Domperidone Impurity 24 (CAS 99-54-7)
- 2,6-Dichloro-4-nitrosophenol (CAS CATO-C4X-30364)
- Ertugliflozin impurity 24 (CAS CATO-C4X-301124)
- Cefditoren Impurity 12 (CAS 2762536-15-0)
- Guaifenesin EP Impurity D (CAS 16929-60-5)
- Tegoprazan Impurity 29 (CAS CATO-C4X-229729)
- N-(1-(Aminomethyl)cycloheptyl)-3-fluorobenzamide (CAS 912770-96-8)
- 2-(4-Isobutylphenyl)-1-(thiophen-2-yl)propan-1-one (CAS 261178-32-9)
- (2-Methyl-2-phenylpropyl)hydrazine (CAS 64191-42-0)
- 4-Bromo-7-chloroisoquinoline (CAS 953421-72-2)
- 4-Chloro-N-hexylbenzamide (CAS 349403-37-8)
- Tirzepatide Impurity 1 (CAS 2460751-66-8)
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