Tadalafil Impurity 155 CAS 691871-71-3
| CAS No. | 691871-71-3 |
| Molecular Formula | C28H23N3O4 |
| Molecular Weight | 465.50 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Tadalafil Impurity 155 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.
Tadalafil Impurity 155 (CAS 691871-71-3) is a certified pharmaceutical impurity reference standard with the molecular formula C28H23N3O4 and a molecular weight of 465.50 g/mol.
The molecular framework of Tadalafil Impurity 155 (C28H23N3O4) is characterized by a steroid core, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
Physical & Chemical Properties
| Molecular Formula | C28H23N3O4 |
| Molecular Weight | 465.50 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) | 19.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Nitrogen Atoms | 3 |
Related Tadalafil Standards
- Tadalafil Impurity 109 (CAS CATO-C4X-1087109)
- Tadalafil Impurity 60 (CAS 1588526-67-3)
- Tadalafil Impurity 93 (CAS CATO-C4X-108793)
- Tadalafil Impurity 26 (CAS 1598416-08-0)
- Tadalafil Impurity 110 (CAS CATO-C4X-1087110)
- Tadalafil Impurity 105 (CAS CATO-C4X-1087105)
- Tadalafil Impurity 153 (CAS CATO-C4X-1087153)
- Tadalafil impurity 125 (CAS CATO-C4X-1087125)
Recommended Standards
- 2,2'-(((4R,7S,12R)-7-amino-6,10-dioxo-1,2-dithia-5,11-diazacyclotridecane-4,12-dicarbonyl)bis(azanediyl))diacetic acid (CAS CATO-C3D-262909)
- Avanafil Impurity 69 (CAS CATO-C4X-111869)
- Ethyl 2-(4-(fluorosulfonyl)phenyl)-4-oxo-1,4-dihydroquinoline-6-carboxylate (CAS 80789-71-5)
- Baloxavir Impurity 19 (CAS 1985605-77-3)
- Belumosudil Impurity 55 (CAS CATO-C4X-298855)
- Bupropion Morpholinol Impurity (HCl Salt) (CAS 106083-71-0)
- Bumetanide Impurity 52 (CAS CATO-C4X-198652)
- 9-(1-Phenylethyl)-1H-purin-6(9H)-one (CAS 34396-98-0)
- Gemfibrozil Impurity N1 (CAS 63258-18-4)
- 4-(Pyridin-4-yl)pyrrolidin-2-one (CAS 1268132-89-3)
- 1-(2-Bromoethoxy)-2-ethylbenzene (CAS 915922-20-2)
- 2-Bromo-4-(4-chloro-phenyl)-nicotinic acid (CAS 147078-81-7)
- TCBT 27 (CAS 121107-47-9)
- Liraglutide Impurity 28 (CAS CATO-C4X-199228)
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