Udenafil Impurity 3 CAS CATO-C4X-33723
| CAS No. | CATO-C4X-33723 |
| Molecular Formula | C18H23ClN4O5S |
| Molecular Weight | 442.92 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Udenafil Impurity 3 (CAS CATO-C4X-33723), a pharmacopoeial impurity reference standard (molecular formula C18H23ClN4O5S, MW 442.92 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Udenafil Impurity 3 (C18H23ClN4O5S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 442.92 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
CATO manufactures Udenafil Impurity 3 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 | C18H23ClN4O5S |
| Molecular Weight | 442.92 g/mol |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 4 |
| Sulfur Atoms | 1 |
Related Udenafil Standards
Recommended Standards
- N-(2-Chloro-4,6-dimethylphenyl)-2-((5-(furan-2-yl)-4-(furan-2-ylmethyl)-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 843616-40-0)
- (S)-2-((2R,4S)-4-acetamido-2-(4-chlorobenzyl)piperidin-1-yl)-2-oxo-1-phenylethyl acetate (CAS 177707-21-0)
- Methyl 5-((2-chlorophenyl)carbamoyl)-4-methyl-2-(3-methylbenzamido)thiophene-3-carboxylate (CAS 335407-75-5)
- (S)-2-((2S,4R)-4-acetamido-2-(4-chlorobenzyl)piperidin-1-yl)-2-oxo-1-phenylethyl acetate (CAS 177770-52-4)
- Venetoclax Impurity 25 (CAS 2097938-69-5)
- Pramipexole Impurity 91 HCl (CAS 1585235-18-2)
- Doxofylline Impurity 3 (CAS 1174289-18-9)
- 1-((2R)-2-Amino-2-cyclohexylacetyl)-N-(4'-cyanobenzyl)-2-L-azetidinecarboxamide (CAS 1356010-93-9)
- Sitafloxacin Impurity 27 (CAS CATO-C4X-115527)
- Methyl 6-iodo-4-oxo-1,4-dihydroquinoline-2-carboxylate (CAS 1176210-14-2)
- 5-(2-Methoxyphenyl)-1H-pyrazole-3-carboxylic acid (CAS 834868-54-1)
- 6-Chloro-5-methylpyridazin-3-ol (CAS 1822677-94-0)
- 7-Nitro-1,2,3,4-tetrahydroquinoline (CAS 30450-62-5)
- Semaglutide impurity 46 (CAS CATO-C4X-222646)
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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