Tadalafil Impurity 56 CAS 406938-39-4
Purity 97%+In StockPharmacopoeial Impurity Standards
| CAS No. | 406938-39-4 |
| Molecular Formula | C19H16N2O4 |
| Molecular Weight | 336.34 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Tadalafil Impurity 56 (CAS 406938-39-4) is a pharmacopoeial impurity standards certified reference material from CATO. Molecular formula: C19H16N2O4. Molecular weight: 336.34 g/mol. ISO 17034 accredited production ensures traceable purity and reliable analytical results.
Physical & Chemical Properties
| Molecular Formula | C19H16N2O4 |
| Molecular Weight | 336.34 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 2 |
Related Tadalafil Standards
- Tadalafil impurity 97 (CAS CATO-C4X-108797)
- Tadalafil Impurity 61 (CAS 1370438-57-5)
- Tadalafil Impurity 115 (CAS 1910845-11-2)
- Tadalafil Impurity 58 (CAS CATO-C4X-108758)
- Tadalafil Impurity 21 (CAS 951661-85-1)
- Tadalafil Impurity 23 (CAS 951661-82-8)
- Tadalafil Impurity 133 (CAS 171596-44-4)
- Tadalafil Impurity 134 (CAS 171596-43-3)
Recommended Standards
- Tenofovir Disoproxil Impurity 46 (CAS CATO-C4X-107646)
- (2R,3S,5R,6R,7R,8R)-2-Hydroxy-12-isopropenyl-7-methyl-11-oxospiro[4,10-dioxatetracyclo[7.2.1.02,7.03,5]dodecane-6,2\'-oxiran]-8-yl acetate 2749-28-2 (CAS 2749-28-2)
- Mycophenolate Mofetil Impurity 17 (CAS 26644-06-4)
- Articaine Hydrochloride EP Impurity I (CAS 85006-31-1)
- Pregabalin Impurity 56 (CAS CATO-C4X-131256)
- 4-Amino-1-(2-hydroxyethyl)-1h-pyrazole-3-carboxylic acid (CAS 1427022-02-3)
- Iguratimod Impurity 120 (CAS CATO-C4X-1826120)
- tert-Butyl (20-hydroxy-3,6,9,12,15,18-hexaoxaicosyl)(methyl)carbamate (CAS 2874309-76-7)
- 2-Amino-5-methoxypyrimidine-4,6-diol (CAS 98142-98-4)
- Semaglutide impurity 66 (CAS CATO-C4X-222666)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 13829788188 / jacky.chen@cato-chem.com