Tadalafil Impurity 167 CAS CATO-C4X-1087167
| CAS No. | CATO-C4X-1087167 |
| Molecular Formula | C22H19N3O6 |
| Molecular Weight | 421.40 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C22H19N3O6, Tadalafil Impurity 167 contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 421.40 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.
CATO supplies Tadalafil Impurity 167 (CAS CATO-C4X-1087167), a pharmacopoeial impurity reference standard (molecular formula C22H19N3O6, MW 421.40 g/mol) used for the identification and quantification of trace impurities in APIs.
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 Tadalafil Impurity 167 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 | C22H19N3O6 |
| Molecular Weight | 421.40 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 3 |
Related Tadalafil Standards
- Tadalafil EP Impurity D (CAS CATO-C4X-10874)
- Tadalafil EP Impurity E (CAS 2520114-41-2)
- Tadalafil EP Impurity F (CAS 2747958-44-5)
- Tadalafil EP Impurity H (CAS 1978322-98-3)
- Tadalafil Impurity 32 (CAS CATO-C4X-108732)
- Tadalafil Impurity 62 (CAS CATO-C4X-108762)
- Tadalafil Impurity 82 (CAS CATO-C4X-108782)
- Tadalafil Impurity 162 (CAS CATO-C4X-1087162)
Recommended Standards
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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